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New Cisco 200-105 Exam Dumps Collection (Question 16 - Question 25)
Q1. In which solution is a router ACL used?
A. filtering packets that are passing through a router
B. to change the default administrative distance of a route in the route table
C. protecting a server from unauthorized access
D. controlling path selection, based on the route metric
Answer: A
Q2. Which two circumstances can cause collision domain issues on VLAN domain? (Choose two.)
A. duplex mismatches on Ethernet segments in the same VLAN
B. multiple errors on switchport interfaces
C. congestion on the switch inband path
D. a failing NIC in an end device
E. an overloaded shared segment
Answer: A,E
Explanation: Collision Domains
A collision domain is an area of a single LAN where end stations contend for access to the network because all end stations are connected to a shared physical medium. If two connected devices transmit onto the media at the same time, a collision occurs. When a collision occurs, a JAM signal is sent on the network, indicating that a collision has occurred and that devices should ignore any fragmented data associated with the collision. Both sending devices back off sending their data for a random amount and then try again if the medium is free for transmission. Therefore, collisions effectively delay transmission of data, lowering the effective throughput available to a device. The more devices that are attached to a collision domain, the greater the chances of collisions; this results in lower bandwidth and performance for each device attached to the collision domain. Bridges and switches terminate the physical signal path of a collision domain, allowing you to segment separate collision domains, breaking them up into multiple smaller pieces to provide more bandwidth per user within the new collision domains formed.
Q3. Which two options are valid WAN connectivity methods? (Choose two.)
A. PPP
B. WAP
C. DSL
D. L2TPv3
E. Ethernet
Answer: A,C
Explanation:
On each WAN connection, data is encapsulated into frames before itcrosses the WAN link. The following are typical WAN protocols:1. High-level Data Link Control (HDLC): The Cisco default encapsulation type onpoint-to-point connections, dedicated links, and circuit- switches connections.2. PPP: Provides router-to-router and host-to-network connections over synchronous andasynchronous circuits. PPP was designed to work with several network layer protocols,including IP.3. Frame-relay: A successor to X.25. This protocol is an industry-standard, switchesdata-link layer protocol that handles multiple virtual circuits
http://en.wikipedia.org/wiki/Wide_area_network
Q4. Refer to the exhibit.
What information about the interfaces on the Main_Campus router is true?
A. The LAN interfaces are configured on different subnets.
B. Interface FastEthernet 0/0 is configured as a trunk.
C. The Layer 2 protocol of interface Serial 0/1 is NOT operational.
D. The router is a modular router with five FastEthernet interfaces.
E. Interface FastEthernet 0/0 is administratively deactivated.
Answer: B
Explanation:
Interface fa0/0 breaks into sub-interfaces and Main_Campus router is connected with
switch via fa0/0 .Subinterfaces configured with different subnet masks so the same switch has multiple vlans and allows communication between these VLAN's. For routing and inter- vlan we need to configure a trunk port. So B will be the correct answer.
Q5. Which two actions must you take to configure a PAgP EtherChannel between two switches, S1 and S2? (Choose two.)
A. Configure the channel-group 1 mode auto command on S1.
B. Configure the channel-group 1 mode desirable command on S2.
C. Configure the channel-group 1 mode active command on S2.
D. Configure the channel-group 1 mode on command on S2.
E. Configure the channel-group 1 mode active command on S1.
Answer: A,B
Q6. How does a router handle an incoming packet whose destination network is missing from the Routing table?
A. it discards the packet.
B. it broadcasts the packet to each network on the router.
C. it routes the packet to the default route.
D. it broadcasts the packet to each interface on the router.
Answer: C
Q7. Refer to the exhibit.
At the end of an RSTP election process, which access layer switch port will assume the discarding role?
A. Switch3, port fa0/1
B. Switch3, port fa0/12
C. Switch4, port fa0/11
D. Switch4, port fa0/2
E. Switch3, port Gi0/1
F. Switch3, port Gi0/2
Answer: C
Explanation:
In this question, we only care about the Access Layer switches (Switch3 & 4). Switch 3 has a lower bridge ID than Switch 4 (because the MAC of Switch3 is smaller than that of Switch4) so both ports of Switch3 will be in forwarding state. The alternative port will surely belong to Switch4.
Switch4 will need to block one of its ports to avoid a bridging loop between the two switches. But how does Switch4 select its blocked port? Well, the answer is based on the BPDUs it receives from Switch3. A BPDU is superior than another if it has:
1. A lower Root Bridge ID2. A lower path cost to the Root3. A lower Sending Bridge ID4. A lower Sending Port ID
These four parameters are examined in order. In this specific case, all the BPDUs sent by Switch3 have the same Root Bridge ID, the same path cost to the Root and the same Sending Bridge ID. The only parameter left to select the best one is the Sending Port ID (Port ID = port priority + port index). In this case the port priorities are equal because they use the default value, so Switch4 will compare port index values, which are unique to each port on the switch, and because Fa0/12 is inferior to Fa0/1, Switch4 will select the port connected with Fa0/1 (of Switch3) as its root port and block the other port -> Port fa0/11 of Switch4 will be blocked (discarding role)
Q8. Which feature can validate address requests and filter out invalid messages?
A. IP Source Guard
B. port security
C. DHCP snooping
D. dynamic ARP inspection
Answer: C
Q9. What is the best way to verify that a host has a path to other hosts in different networks?
A. Ping the loopback address.
B. Ping the default gateway.
C. Ping the local interface address.
D. Ping the remote network.
Answer: D
Explanation:
Ping is a tool that helps to verify IP-level connectivity; PathPing is a tool that detects packet loss over multiple-hop trips. When troubleshooting, the ping command is used to send an ICMP Echo Request to a target host name or IP address. Use Ping whenever you want to verify that a host computer can send IP packets to a destination host. You can also use the Ping tool to isolate network hardware problems and incompatible configurations.
If you call ipconfig /all and receive a response, there is no need to ping the loopback address and your own IP address u2014 Ipconfig has already done so in order to generate the report.
It is best to verify that a route exists between the local computer and a network host by first using ping and the IP address of the network host to which you want to connect. The command syntax is:
ping < IP address >
Perform the following steps when using Ping:
u2711 Ping the loopback address to verify that TCP/IP is installed and configured correctly on the local computer.
ping 127.0.0.1
If the loopback step fails, the IP stack is not responding. This might be because the TCP drivers are corrupted, the network adapter might not be working, or another service is interfering with IP.
u2711 Ping the IP address of the local computer to verify that it was added to the network
correctly. Note that if the routing table is correct, this simply forwards the packet to the loopback address of 127.0.0.1.
ping < IP address of local host >
u2711 Ping the IP address of the default gateway to verify that the default gateway is functioning and that you can communicate with a local host on the local network.
ping < IP address of default gateway >
u2711 Ping the IP address of a remote host to verify that you can communicate through a router.
ping < IP address of remote host >
u2711 Ping the host name of a remote host to verify that you can resolve a remote host name.
ping < Host name of remote host >
u2711 Run a PathPing analysis to a remote host to verify that the routers on the way to
the destination are operating correctly. pathping < IP address of remote host >
Q10. Refer to the exhibit.
If the router R1 returns the given output and has not had its router ID set manually, what address will EIGRP use as its router ID?
A. 192.168.1.2
B. 172.16.4.1
C. 192.168.10.2
D. 1.1.1.1
Answer: D
Explanation:
The router ID is selected according to the following rules:
u2711 manual configuration
u2711 highest up/up loopback
u2711 highest up/up physical interface
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