Oracle 1Z0-821 Practice Exam 2021

NEW QUESTION 1
User jack on host solaris attempts to use ssh to log in to host oracle and receives this message:
jack@solaris:~$ ssh oracle
ssh: connect to host oracle port 22: connection refused What is the problem?

• A. Host oracle does not have a valid host public key.
• B. Host oracle does not have a valid host private key.
• C. Host solaris does not have a valid host public key.
• D. Host does not have a valid host private key.
• E. Host solaris is not configured for host-based authentication.
• F. Host oracle is not configured for host-based authentication.
• G. Host oracle is not running the ssh service.
• H. Host solaris is not running the ssh service.

Answer: G

Explanation:
The host he is trying to connect to (oracle) is not running the required service (ssh).

NEW QUESTION 2
Which two accurately identify features of a Solaris 10 branded zone?

• A. executes in a Solaris 10 global zone
• B. is created by importing a Solaris 10 flash archive
• C. enables Linux binary applications to run unmodified
• D. provides a complete runtime environment for Solaris 9 applications
• E. allows a Solaris 10 global zone to be migrated into a Solaris 10 non-global zone on a Solaris 11 system

Answer: BE

Explanation:
B: It can be created by importing a Solaris 10 flash archive.
You can use the Oracle Solaris Flash archiving tools to create an image of an installed
system that can be migrated into a zone.
The system can be fully configured with all of the software that will be run in the zone before the image is created. This image is then used by the installer when the zone is installed.
Note: You can use alternate methods for creating the archive. The installer can accept the following archive formats:
* cpio archives
* gzip compressed cpio archives
* bzip2 compressed cpio archives
* pax archives created with the -x xustar (XUSTAR) format Ä ufsdump level zero (full) backups
Note:
Branded zones that run an environment different that the OS release on the system
* The lx branded zone introduced in the Solaris 10 8/07 release provides a Linux environment for your applications and runs on x86 and x64 machines on the Oracle Solaris 10 OS.
* The solaris8 and solaris9 branded zones enable you to migrate an Oracle Solaris 8 or Oracle Solaris 9 system to an Oracle Solaris 8 or Oracle Solaris 9 Container on a host running the Oracle Solaris 10 8/07 Operating System or later Oracle Solaris 10 release.
* The Oracle Solaris 10 Container brand is available in OpenSolaris build 127. These branded zones host Oracle Solaris 10 user environments.
Note: One of the powerful features of Solaris 11 is the ability to run a Solaris 10 environment in a zone. Solaris 10 allows you to run Solaris 8 and 9 environments in zones, but only on SPARC.

NEW QUESTION 3
Review the zonestat command:
zonestate - q physical - memory -R high -z -p -p “zones” 10 24h 60m
Select the option that correctly describes the information that is displayed by this command.

• A. It is a sample of dbzone’s physical memory usage taken every hour over a 24-hour period.Only the top 10 samplings of peak memory usage are displaye
• B. All other utilization data is eliminated.
• C. It is a sample of dbzone’s CPU, virtual memory, and networking utilization.Physical memory is executed from the report.The sampling is taken every 10 minutes over a 24- hour period and peak utilization id displayed each hour.
• D. It is a sample of dbzone’s CPU, virtual memory, and networking utilization.Physical memory is executed from the report.The sampling is taken every 10 minutes over a 24- hour period and displayed each hour.
• E. It is a sample of dbzone’s physical memory usage taken every 10 seconds and 24-hour period.Only peak virtual memory usage and CPU utilization are displayed each hour.All other Utilization data is eliminated.
• F. It is a sample of dbzone’s physical memory usage taken every 10 seconds and 24-hour period.Only peak memory usage is displayed each hour.All other utilization data is eliminated.

Answer: D

Explanation:
* (Not A, B, C): interval (here 10 seconds): Specifies the length in seconds to pause between each interval report.
* duration (here 24 h)
* -R report[, report] (here high) Print a summary report.
High Print a summary report detailing the highest usage of each resource and zone during any interval of the zonestat utility invocation.
Note: The zonestat utility reports on the cpu, memory, and resource control utilization of the currently running zones. Each zone's utilization is reported both as a percentage of system resources and the zone's configured limits.
The zonestat utility prints a series of interval reports at the specified interval. It optionally
also prints one or more summary reports at a specified interval.
The default output is a summary of cpu, physical, and virtual memory utilization. The -r option can be used to choose detailed output for specific resources.

NEW QUESTION 4
Which two options are characteristics of a fast reboot?

• A. A fast reboot bypasses grub.
• B. A fast reboot cannot be used after a system panic on the x86 platform.
• C. A fast reboot can only be executed on the SPARC platform when the config/fastreboot_default property for the svc:/system/boot-config:default service is set to true.
• D. A fast reboot uses an in-kernel boot loader to load the kernel into memory.
• E. A fast reboot is the default on all platforms.

Answer: CD

Explanation:
C: To change the default behavior of the Fast Reboot feature on the SPARC platform, so that a fast reboot is automatically performed when the system reboots, see below.
The following example shows how to set the property's value to true on the SPARC platform, so that a fast reboot is initiated by default:
# svccfg -s "system/boot-config:default" setprop config/fastreboot_default=true
# svcadm refresh svc:/system/boot-config:default
D: Fast Reboot implements an in-kernel boot loader that loads the kernel into memory and then switches to that kernel.
The firmware and boot loader processes are bypassed, which enables the system to reboot within seconds.
The Fast Reboot feature is managed by SMF and implemented through a boot configuration service, svc:/system/boot-config. The boot-config service provides a means for setting or changing the default boot configuration parameters. When the config/fastreboot_default property is set to true, the system performs a fast reboot automatically, without the need to use the reboot -f command. This property's value is set to true on the x86 platform. For task-related information, including how to change the default behavior of Fast Reboot on the SPARC platform, see Accelerating the Reboot Process on an x86 Based System.
Note: One new feature, called Fast Reboot, will allow the system to boot up without doing the routine set of hardware checks, a move that can make system boot times up to two- and-a-half times faster, Oracle claimed. This feature can be handy in that an administrator applying a patch or software update across thousands of Solaris deployments can reboot them all the more quickly.

NEW QUESTION 5
Examine this command and its output:
# zoneadm list Global
zone2
Which two outcomes can be deduced from this output?

• A. There is exactly one nonglobal zone installed.
• B. There is one nonglobal zone running.
• C. There is at least one oneglobal zone configured.
• D. There is one nonglobal zone that is not configured.
• E. There is one nonglobal zone that is not running.
• F. The is one nonglobal zone that is not installed.
• G. There is exactly one nonglobal zone configured.

Answer: BC

NEW QUESTION 6
Given the following output of the zpool status command:

Identify the correct statement regarding pool1’s configuration.

• A. Data written to pool1 will be stripped across four disk components.
• B. The rsdz1-0 and c3t640 components are submirrors of pool1.
• C. Data will only be stripped across the three disks in rsidz configuration.
• D. The configuration is a bug in Solaris 11; it cannot be created by an administrator.

Answer: B

NEW QUESTION 7
View the Exhibit.

Which is true regarding the disk drive?

• A. This disk configuration could be used as a ZFS root disk.
• B. This disk contains an SMI disk label.
• C. Slice 7 represents the entire disk and cannot be used as a slice for a file system
• D. The disk contains an EFI disk label.

Answer: A

Explanation:
Installing a ZFS Root Pool
The installer searches for a disk based on a recommended size of approximately 13 GB.

NEW QUESTION 8
What is the result of executing the following command? svcs -d svc:/network/ssh:default

• A. disables the svc:/network/ssh:default service
• B. displays the services that svc: /network/ssh:default is dependent on
• C. displays the services that are dependent on the svc: /network/ssh:default service
• D. deletes the svc: /network/ssh:default service

Answer: B

Explanation:
The svcs command displays information about service instances as recorded in the service configuration repository.
-d Lists the services or service instances upon which the given service instances depend.

NEW QUESTION 9
Which three Installation option allow for a "hands free" and "unattended'" Installation of the Solaris 11 environment?

• A. Jumpstart
• B. LiveCD
• C. A text Installation over the network
• D. An Automated Installation performed on an x86 client
• E. An Automated Installation using media from a local DVD or USB drive
• F. An Automated Installation using a networked repository

Answer: DEF

Explanation:
Oracle Solaris 11 uses Automated Installer (AI) for unattended installations.
Unattended installations are possible by placing the contents of the AI Image media (or ISO image contents from a download) on an AI server.

NEW QUESTION 10
Before booting test zone a non-global zone, you want to connect to the zone’s console so that you can watch the boot process.
Choose the command used to connect to testzone’s console.

• A. zoneadm -C testzone
• B. zoneadm -console testzone
• C. zlogin - z testzone console
• D. zlogin - z testzone - C
• E. zlogin -C testzone
• F. zoneadm - testzone - c

Answer: E

Explanation:
The following options are supported:
C
Connects to the zone console. Connects to the zone console.
Note:
After you install a zone, you must log in to the zone to complete its application environment. You might log in to the zone to perform administrative tasks as well. Unless the -C option is used to connect to the zone console, logging in to a zone
using zlogin starts a new task. A task cannot span two zones

NEW QUESTION 11
You created a new zpool. Now you need to migrate the existing ZFS file system from pool1/prod to pool2/prod.
You have these requirements:
1. Users must have access to the data during the migration, so you cannot shutdown the file system while the migration takes place.
2. Because you want to copy the data as quickly as possible, you need to increase the server resources devoted to the ZFS migration.
Which method would you use to modify the ZFS shadow migration daemon defaults to increase the concurrency and overall speed of migration?

• A. Svccfg - s filesystem/shadowd:defaultsetprop config_params/shadow_threads=integer: 16endsvcadm refresh filesystem/shadowd: default
• B. Specify the -b <blocksize> option with the zfs create command and increase the value of<blocksize>
• C. Use the -o -volblocksize=<blocksize>option with the zfs create command and increase the value of the default <blocksize>.
• D. Svccfg -s filesystem/zfs: defaultsetprop config_params/shadow_threads = integer: 16endsvcadm refresh filesystem/zfs:default

Answer: A

Explanation:
shadowd is a daemon that provides background worker threads to migrate data for a shadow migration. A shadow migration gradually moves data from a source file system into a new “shadow” file system. Users can access and change their data within the shadow file system while migration is occurring.
The shadowd service is managed by the service management facility, smf(5).
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The service's status can be queried using the svcs(1) command.
The svccfg(1M) command can be used to manage the following parameter related to shadowd:
config_params/shadow_threads
Note: Oracle Solaris 11: In this release, you can migrate data from an old file system to a new file system while simultaneously allowing access and modification of the new file system during the migration process.
Setting the shadow property on a new ZFS file system triggers the migration of the older data. The shadow property can be set to migrate data from the local system or a remote system with either of the following values:
file:///path nfs://host:path

NEW QUESTION 12
View the Exhibit.

After Installing the OS, you need to verify the network interface information. Which command was used to display the network interface information in the exhibit?

• A. ifconfiq –a
• B. ipadm show-addr
• C. svcs –1 network/physical
• D. netstat –a

Answer: B

Explanation:
'ipadm show-addr' displays all the configured addresses on the system. Example:
# ipadm show-addr
ADDROBJ TYPE STATE ADDR
lo0/v4 static ok 127.0.0.1/8 lo0/v6 static ok ::1/128

NEW QUESTION 13
The OpenBoot firmware controls the operation of the system before the operating system is loaded.
Which four tasks are directly controlled by the OpenBoot firmware?

• A. Provides a list of boot entries from which to choose
• B. Allows hardware to identify itself and load its own plug-in device driver
• C. Loads the boot loader from the configured boot device
• D. Performs basic hardware testing
• E. Installs the console
• F. Reads and executes the boot archive
• G. Extract and executes the kernel image

Answer: ABCD

Explanation:
OpenBoot firmware is executed immediately after you turn on your system. The primary tasks of OpenBoot firmware are to:
* Test and initialize the system hardware (D)
* Determine the hardware configuration (D)
*Boot the operating system from either a mass storage device or from a network
*Provide interactive debugging facilities for testing hardware and software
Some notable features of OpenBoot firmware.
* Plug-in Device Drivers (B)
Most common tasks that you perform using OpenBoot
* Booting Your System
The most important function of OpenBoot firmware is to boot the system.
Note: If auto-boot? is true, the system will boot from either the default boot device or from the diagnostic boot device depending on whether OpenBoot is in diagnostic mode. (C)

NEW QUESTION 14
Which three of the components could be used in a ZFS storage pool, but are not recommended configurations?

• A. A file on a UFS file system
• B. A Veritas Volume Manager (VxVM) volume
• C. A LUN In a hardware RAID array
• D. A disk slice from an SMI labeled disk
• E. A Solaris Volume Manager (SVM) volume
• F. An EFI labeled disk

Answer: ABE

Explanation:
A: ZFS also allows you to use UFS files as virtual devices in your storage pool. This feature is aimed primarily at testing and enabling simple experimentation, not for production use. The reason is that any use of files relies on the underlying file system for consistency. If you create a ZFS pool backed by files on a UFS file system, then you are implicitly relying on UFS to guarantee correctness and synchronous semantics.
However, files can be quite useful when you are first trying out ZFS or experimenting with more complicated layouts when not enough physical devices are present. All files must be specified as complete paths and must be at least 64 Mbytes in size.
B, E: You can construct logical devices for ZFS using volumes presented by software-
based volume managers, such as Solaris Volume Manager (SVM) or Veritas Volume Manager (VxVM). However, these configurations are not recommended. While ZFS functions properly on such devices, less-than-optimal performance might be the result.

NEW QUESTION 15
You need to migrate a UFS file system named /production_ufs to a ZFS file system named
/production_ufs. The /production_ufs file system cannot be taken down or be out of production during the migration, and the current /production_ufs file system must remain active until the /ptoduction_zfs file system is copied and ready.
Which method allows you to meet both requirements?
1. Copy live data from /production_ufs to /production_zfs while /production_ufs is in use.
2. When the copy is complete, /production_zfs will contain an up-to date copy of
/production_ufs

• A. Create a snapshot of the UFS file syste
• B. Create the new ZFS file syste
• C. Use cpio to copy data from the snapshot to the new ZFS file system.
• D. Create a new Boot Environmen
• E. Create the ZFS file syste
• F. Use lucreate -m to copy data from the Current UFS file system to the new ZFS file system.
• G. Mirror the existing UFS file system by using SVM.After both submissions are in sync, migrate one of the submissions to a ZFS file System by using Live Upgrade.
• H. Create the new ZFS file system by using zfs create import to import data from the existing UFS file system into the new ZFS file system
• I. Create the new zfs file system by using the zfs create -o shadow.

Answer: E

Explanation:
Migrating Data With ZFS Shadow Migration
ZFS shadow migration is a tool you can use to migrate data from an existing file system to a new file system. A shadow file system is created that pulls data from the original source as necessary.
You can use the shadow migration feature to migrate file systems as follows:
* A local or remote ZFS file system to a target ZFS file system
* A local or remote UFS file system to a target ZFS file system
Shadow migration is a process that pulls the data to be migrated:
* Create an empty ZFS file system.
* Set the shadow property on an empty ZFS file system, which is the target (or shadow) file system, to point to the file system to be migrated.
For example:
# zfs create -o shadow=nfs://system/export/home/ufsdata users/home/shadow2
* Data from file system to be migrated is copied over to the shadow file system.

NEW QUESTION 16
A user brian is configured to use the bash shell. His home directory is /export/home/brian, and contains a .profile and a .bashrc file.
In the -profile, there are these lines: genius =ritchie
export genius
In the .bashrc us this line: genius=kernighan
In /etc/profile are these lines: genius=thompson
export genius
When brian logs in and asks for the value of genius, what will he find, and why?

• A. genius will be ritchie, because that was the value exported in .profile.
• B. genius will be kernighan, because .bashrc executes after .profile.
• C. genius will be ritchie because variable settings in .profile take precedence over variable settings in .bashrc.
• D. genius will be ritchie because .profile executes after .bashrc.
• E. genius will be thompson because /etc/profile system settings always override local settings.

Answer: C

NEW QUESTION 17
You need to set up an Oracle Solaris 11 host as an iSCSI target so that the host's disk can be accessed over a storage network. The disk device is c3t4d0.
Which six options describe the steps that need to be taken on this host to enable an iSCSI target?

• A. Create a ZFS file system named iscsi/target.
• B. Create a zpool named iscsi with disk device c3t4d0
• C. Create zfs volume named iscsi/target.
• D. Use the stmfadm command to create a LUN using /dev/zvol/rdsk/iscsi/target.
• E. Use the stmfadm command to create a LUN using iscsi/target.
• F. Use the stmfadm command to make the LUN viewable.
• G. Use the stmfadm command to make the volume viewable.
• H. Enable the svc:/network/iscsi/target:default Service.
• I. Use the itadm command to create the iSCSI target.

Answer: BCDFHI

Explanation:
How to Create an iSCSI LUN
The following steps are completed on the system that is providing the storage device.
Example: target# zpool create sanpool mirror c2t3d0 c2t4d0 (C)2. Create a ZFS volume to be used as a SCSI LUN. (D)3. Create a LUN for the ZFS volume.
Example:
target# stmfadm create-lu /dev/zvol/rdsk/sanpool/vol1
Logical unit created: 600144F0B5418B0000004DDAC7C10001
4. Confirm that the LUN has been created.
Example
target# stmfadm list-lu
LU Name: 600144F0B5418B0000004DDAC7C10001
(F) 5. Add the LUN view.
This command makes the LUN accessible to all systems.
target# stmfadm add-view 600144F0B5418B0000004DDAC7C10001 How to Create the iSCSI Target
This procedure assumes that you are logged in to the local system will contains the iSCSI target.
Note: The stmfadm command manages SCSI LUNs. Rather than setting a special iSCSI property on the ZFS volume, create the volume and use stmfadm to create the LUN.
(H) 1. Enable the iSCSI target service.
target# svcadm enable -r svc:/network/iscsi/target:default
(I) 2. Create the iSCSI target.
target# itadm create-target

NEW QUESTION 18
Which five statements describe options available for installing the Oracle Solaris 11operating system using the installation media?

• A. You can perform a text or LiveCD installation locally or over the network.
• B. The text Installer does not install the GNOME deskto
• C. The GNOME desktop package must he added after you have installed the operating system.
• D. The LiveCD Installation cannot be used to install multiple instances of Oracle Solaris.
• E. The LiveCD installer cannot be used if you need to preserve a specific Solaris Volume Table of Contents (VTOC) slice in your current operating system.
• F. The LiveCD Installer is for x86 platforms only.
• G. The GUI installer cannot be used to upgrade your operating system from Solaris 10.
• H. If you are installing Oracle Solaris 11 on an x86-based system that will have more than one operating system installed in it, you cannot partition your disk during the installation process.
• I. The LiveCD installer can be used for SPARC or x86 platforms.

Answer: ABDFH

Explanation:
A: If the network is setup to perform automated installations, you can perform a text installation over the network by setting up an install service on the network and selecting a text installation when the client system boots.
B: After a fresh install of Solaris 11 express, only the console mode is activated. To add Gnome, simply do :
$ sudo pkg install slim_install
This will install additional packages that are not installed by default. D: The text installer advantages over the GUI installer include:
* In addition to modifying partitions, the text installer enables you to create and modify VTOC slices within the Solaris partition.
F: How do I upgrade my Solaris 10 or lower systems to Solaris 11?
Unfortunately, you CAN'T. There is no direct upgrade installer or other tool that will allow you to upgrade from earlier releases of Solaris to Solaris 11. This is primarily due to the vast changes in the packaging mechanism in Solaris 10.

NEW QUESTION 19
You wish to troubleshoot some issues that you are having on the system. You want to monitor the /var/adm/messages file in real time. Which command would you use to do this?

• A. head
• B. tail
• C. cat
• D. file
• E. test

Answer: B

Explanation:
tail is a program on Unix and Unix-like systems used to display the last few lines of a text file or piped data.
By default, tail will print the last 10 lines of its input to the standard output. With command line options the number of lines printed and the printing units (lines, blocks or bytes) may be changed. The following example shows the last 20 lines of filename:
tail -n 20 filename

NEW QUESTION 20
When speaking to an Oracle Support Engineer, you are asked to verify the version of the Solaris 11 build currently running on your system.
Which command would display the Solaris 11 build version currently running on your system?

• A. pkg info all
• B. cat /etc/release
• C. cat /etc/update
• D. prtconf | grep –i update
• E. pkg info entire

Answer: B

Explanation:
Which Solaris release you are running on your system can be determined using the following command:
cat /etc/release
This will tell you which release you are running and when it was released. The more recent your system, the more info is contained in this file.
Example:
# cat /etc/release
Oracle Solaris 10 8/11 s10s_u10wos_17b SPARC
Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved. Assembled 23 August 2011

NEW QUESTION 21
You have been asked to do an orderly shutdown on a process with a PID of 1234, with the kill command.
Which command is best?

• A. kill -2 1234
• B. kill -15 1234
• C. kill -9 1234
• D. kill -1 1234

Answer: B

Explanation:
On POSIX-compliant platforms, SIGTERM is the signal sent to a process to request its termination. The symbolic constant for SIGTERM is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms, however on the vast majority of systems, SIGTERM is signal #15.
SIGTERM is the default signal sent to a process by the kill or killall commands. It causes the termination of a process, but unlike the SIGKILL signal, it can be caught and interpreted (or ignored) by the process. Therefore, SIGTERM is akin to asking a process to terminate nicely, allowing cleanup and closure of files. For this reason, on many Unix systems during shutdown, init issues SIGTERM to all processes that are not essential to powering off, waits a few seconds, and then issues SIGKILL to forcibly terminate any such processes that remain.

NEW QUESTION 22
You suspect a problem with the oponldap package and want to make sure that the files have not be modified or otherwise tampered with.
Which command would validate all of the files contained in the openldap package and report any problems?

• A. pkgchk openldap
• B. pkginfo openldap
• C. pkg contents openldap
• D. pkg verify openldap
• E. pkg set-property signature-policy verify

Answer: A

Explanation:
pkgchk checks the accuracy of installed files or, by using the -l option, displays information about package files. pkgchk checks the integrity of directory structures and files. Discrepancies are written to standard error along with a detailed explanation of the problem.

NEW QUESTION 23
You are the administrator for a group of shell script developers. They use vi, and have asked you to make their scripts automatically executable when they save their files.
How can this be accomplished?

• A. Enter set –o vi on the command line, or include it in each user's startup script.
• B. Enter umask –s on the command line, or include it in each user's startup script.
• C. Enter umask 000 on the command line, or include it in each user's startup script.
• D. Enter umask 777 on the command line, or include it in each user's startup script.
• E. It is not possible to automatically set the execute bit on with the umask setting, or vi option.
• F. Enter umask 766 the command line, or include it in the global startup script for the default shell.

Answer: E

Explanation:
Unlike DOS, which uses the file extension to determine if a file is executable or not, UNIX relies on file permissions.
The value assigned by umask is subtracted from the default.
User's file creation mask. umask sets an environment variable which automatically sets file permissions on newly created files. i.e. it will set the shell process's file creation mask to mode.
umask 000 would grant full permissions. Note: 777 full permissions

NEW QUESTION 24
After installing the OS, the following network configuration information is displayed from the system:

Which option describes the state of this server?

• A. The automatic network configuration option was chosen during the installation of the OS.
• B. The manual network configuration option was chosen during the installation of the OS.
• C. The network was not configured during the installation of the OS.
• D. The network interface is configured with a static IP address.

Answer: C

Explanation:
Only the loopback addresses are configured. No IP address is configured.

NEW QUESTION 25
The COMSTAR framework provides support for the iSCSI protocol. Select three options that correctly describe the COMSTAR framework.

• A. iSCSI devices can be used as dump devices.
• B. SCSI commands are carried over IP networks and enable you to mount disk devices from across the network onto your local system.
• C. Large amounts of data can be transferred over an IP network with very little network degradation.
• D. COMSTAR allows you to convert any Solaris11 host into a SCSI target device that can be accessed over a storage network.
• E. One IP port can handle multiple ISCSI target devices.

Answer: BDE

Explanation:
B: By carrying SCSI commands over IP networks, the iSCSI protocol enables you to access block devices from across the network as if they were connected to the local system. COMSTAR provides an easier way to manage these iSCSI target devices.
D: Common Multiprotocol SCSI TARget, or COMSTAR, a software framework that enables you to convert any Oracle Solaris 11 host into a SCSI target device that can be accessed over a storage network by initiator hosts.
E: One IP port can handle multiple iSCSI target devices.

NEW QUESTION 26
A datalink can best be described as .

• A. a driver for a Network Interface Card
• B. the software connecting the Internet Layer and the Physical Layer
• C. a device that provides Classless Inter-Domain Routing
• D. a logical object used for IP Multipathing

Answer: D

Explanation:
The command dladm is used to configure data-link interfaces in Sun Solaris. A configured data-link is represented in the system as interface that can be used for TCP/IP. Each data- link relies on either a single network device or an link aggregation device to send & recieve packets.
Network interfaces provide the connection between the system and the network. These interfaces are configured over data links, which in turn correspond to instances of hardware devices in the system.
In the current model of the network stack, interfaces and links on the software layer build on the devices in the hardware layer. More specifically, a hardware device instance in the
hardware layer has a corresponding link on the data-link layer and a configured interface on the interface layer. This one-to-one relationship among the network device, its data link, and the IP interface is illustrated in the figure that follows.
Network Stack Showing Network Devices, Links, and Interfaces:

NEW QUESTION 27
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