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Q461. Which feature of Cisco IOS XE Software allows for platform-independent code abstraction?
A. its security
B. Common Management Enabling Technology
C. the Linux-based environment
D. its modularity
Answer: D
Q462. Refer to the exhibit.
If IS-IS is configured utilizing default metrics, what is the cost for Router 4 to reach the 10.2.2.0/24 network?
A. 1
B. 20
C. 30
D. 63
Answer: C
Explanation:
By default, every link is an IS-IS network has a metric of 10.
Q463. Which three components comprise the structure of a pseudowire FEC element? (Choose three.)
A. pseudowire ID
B. pseudowire type
C. control word
D. Layer 3 PDU
E. header checksum
F. type of service
Answer: A,B,C
Explanation:
The Pseudowire ID FEC element has the following components:
. Pseudowire ID FEC — The first octet has a value of 128 that identifies it as a Pseudowire ID FEC element.
. Control Word Bit (C-Bit) — The C-bit indicates whether the advertising PE expects the control word to be present for pseudowire packets. A control word is an optional 4-byte field located between the MPLS label stack and the Layer 2 payload in the pseudowire packet. The control word carries generic and Layer 2 payload-specific information. If the C-bit is set to 1, the advertising PE expects the control word to be present in every pseudowire packet on the pseudowire that is being signaled. If the C-bit is set to 0, no control word is expected to be present.
. Pseudowire Type — PW Type is a 15-bit field that represents the type of pseudowire. Examples of pseudowire types are shown in Table 6-1.
. Pseudowire Information Length — Pseudowire Information Length is the length of the Pseudowire ID field and the interface parameters in octets. When the length is set to 0, this FEC element stands for all pseudowires using the specified Group ID. The Pseudowire ID and Interface Parameters fields are not present.
. Group ID — The Group ID field is a 32-bit arbitrary value that is assigned to a group of pseudowires.
. Pseudowire ID — The Pseudowire ID, also known as VC ID, is a non-zero, 32-bit identifier that distinguishes one pseudowire from another. To connect two attachment circuits through a pseudowire, you need to associate each one with the same Pseudowire ID.
. Interface Parameters — The variable-length Interface Parameters field provides attachment circuit-specific information, such as interface MTU, maximum number of concatenated ATM cells, interface description, and so on.
Reference: http://www.ciscopress.com/articles/article.asp?p=386788&seqNum=2
Q464. Which two are features of DMVPN? (Choose two.)
A. It does not support spoke routers behind dynamic NAT.
B. It requires IPsec encryption.
C. It only supports remote peers with statically assigned addresses.
D. It supports multicast traffic.
E. It offers configuration reduction.
Answer: D,E
Explanation:
DMVPN Hub-and-spoke deployment model: In this traditional topology, remote sites (spokes) are aggregated into a headend VPN device at the corporate headquarters (hub). Traffic from any remote site to other remote sites would need to pass through the headend device. Cisco DMVPN supports dynamic routing, QoS, and IP Multicast while significantly reducing the configuration effort.
Reference: http://www.cisco.com/c/en/us/products/collateral/security/dynamic-multipoint-vpn-dmvpn/data_sheet_c78-468520.html
Q465. Refer to the exhibit.
Which statement is true?
A. This is an MPLS TE point-to-multipoint LSP in an MPLS network.
B. This is an MPLS TE multipoint-to-point LSP in an MPLS network.
C. This is a point-to-multipoint LSP in an MPLS network.
D. This is a multipoint-to-multipoint LSP in an MPLS network.
Answer: D
Explanation:
Same example of this provided on slide 24 at the reference link below:
Reference: “mVPN Deployment Models” Cisco Live Presentation
http://d2zmdbbm9feqrf.cloudfront.net/2014/eur/pdf/BRKIPM-2011.pdf, slide 24
Q466. Which two statements are true about VPLS? (Choose two.)
A. It can work over any transport that can forward IP packets.
B. It provides integrated mechanisms to maintain First Hop Resiliency Protocols such as HSRP, VRRP, or GLBP.
C. It includes automatic detection of multihoming.
D. It relies on flooding to propagate MAC address reachability information.
E. It can carry a single VLAN per VPLS instance.
Answer: D,E
Explanation:
VPLS relies on flooding to propagate MAC address reachability information. Therefore, flooding cannot be prevented.
VPLS can carry a single VLAN per VPLS instance. To multiplex multiple VLANs on a single instance, VPLS uses IEEE QinQ.
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-574984.html
Q467. Refer to the exhibit.
What is wrong with the configuration of this tunnel interface?
A. ISATAP tunnels cannot use the EUI-64 address format.
B. No tunnel destination has been specified.
C. The tunnel source of an ISATAP tunnel must always point to a loopback interface.
D. Router advertisements are disabled on this tunnel interface.
Answer: D
Explanation:
Sending of IPv6 router advertisements is disabled by default on tunnel interfaces. This command reenables the sending of IPv6 router advertisements to allow client autoconfiguration:
Example: Router(config-if)# no ipv6 nd ra suppress
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-3s/ir-xe-3s-book/ip6-isatap-xe.html
Q468. You are backing up a server with a 1 Gbps link and a latency of 2 ms. Which two statements about the backup are true? (Choose two.)
A. The bandwidth delay product is 2 Mb.
B. The default TCP send window size is the limiting factor.
C. The default TCP receive window size is the limiting factor.
D. The bandwidth delay product is 500 Mb.
E. The bandwidth delay product is 50 Mb.
Answer: A,C
Explanation:
1 Gbps is the same as 1000 Mbps, and 1000Mb x .0002 = 2 Mbps. With TCP based data transfers, the receive window is always the limiting factor, as the sender is generally able to send traffic at line rate, but then must wait for the acknowledgements to send more data.
Q469. A configuration includes the line ip route 10.0.0.0 255.0.0.0 172.16.10.10 permanent.
Which option is a benefit of configuring this static route as permanent?
A. It allows the route to be redistributed into the network even if the outgoing interface is down.
B. It allows the route to be saved in the running configuration of the device.
C. It places a hidden tag on the route that can be matched on other devices.
D. It allows the route to have a tracking status even if no tracking object is configured.
Answer: A
Q470. DRAG DROP
Drag and drop the IS-IS component on the left to the function that it performs on the right.
Answer:
