Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 611:

  Which three improvements does Cisco IOS XE Software offer over traditional IOS Software? (Choose three.)

  A. It can run applications as separate processes on multicore CPUs.
  B. It supports drivers for data plane ASICs outside of the operating system.
  C. It allows platform-dependent code to be compiled into a single image.
  D. It supports multiple IOS instances simultaneously, sharing resources and internal infrastructure for scalability.
  E. It allows platform-independent code to be abstracted into a single microkernel for portability across platforms.
  F. It uses a QNX Neutrino-based environment underneath the IOS Software.
  A. It can run applications as separate processes on multicore CPUs.
  B. It supports drivers for data plane ASICs outside of the operating system.
  C. It allows platform-dependent code to be compiled into a single image.

• Question 612:

  Which neighbor-discovery message type is used to verify connectivity to a neighbor when the link-layer address of the neighbor is known?

  A. neighbor solicitation
  B. neighbor advertisement
  C. router advertisement
  D. router solicitation
  A. neighbor solicitation

  ---

  IPv6 Neighbor Solicitation Message A value of 135 in the Type field of the ICMP packet header identifies a neighbor solicitation message. Neighbor solicitation messages are sent on the local link when a node wants to determine the link-layer address of another node on the same local link (see the figure below). When a node wants to determine the link- layer address of another node, the source address in a neighbor solicitation message is the IPv6 address of the node sending the neighbor solicitation message. The destination address in the neighbor solicitation message is the solicited-node multicast address that corresponds to the IPv6 address of the destination node. The neighbor solicitation message also includes the link-layer address of the source node.

  Figure 1. IPv6 Neighbor Discovery: Neighbor Solicitation Message

  

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/xe- 3s/ip6b-xe-3s-book/ip6-neighb-disc-xe.html

• Question 613:

  Which two options describe the effect of configuring an interface as passive under OSPF?

  (Choose two)

  A. An adjacency cannot be established, and the interface is not included in the routing protocol update.
  B. The interface processes OSPF hello packets but does not send hello packets.
  C. An adjacency cannot be established, and the interface is included in the routing protocol update.
  D. The interface processes OSPF hello packets and also sends hello packets.
  E. An adjacency can be established, and the interface is not included in the routing protocol update.
  B. The interface processes OSPF hello packets but does not send hello packets.
  C. An adjacency cannot be established, and the interface is included in the routing protocol update.

• Question 614:

  Refer to the exhibit.

  

  At which location will the benefit of this configuration be observed?

  A. on Router A and its upstream routers
  B. on Router A and its downstream routers
  C. on Router A only
  D. on Router A and all of its ARP neighbors
  B. on Router A and its downstream routers

  ---

  The following example shows how to configure the router (and downstream routers) to drop all options packets that enter the network: Router(config)# ip options drop

  Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/sel_drop.html

• Question 615:

  Which three statements about IS-IS are true? (Choose three.)

  A. IS-IS can be used only in the service provider network.
  B. IS-IS can be used to route both IP and CLNP.
  C. IS-IS has three different levels of authentication: interface level, process level, and domain level.
  D. IS-IS is an IETF standard.
  E. IS-IS has the capability to provide address summarization between areas.
  F. IS-IS is a Cisco proprietary routing protocol.
  B. IS-IS can be used to route both IP and CLNP.
  C. IS-IS has three different levels of authentication: interface level, process level, and domain level.
  E. IS-IS has the capability to provide address summarization between areas.

  ---

  Intermediate System to Intermediate System (IS-IS) was designed as the routing protocol for ISO's CLNP described in IS0 10589. IS-IS is a Link State routing protocol akin to OSPF and was developed by DEC for use with DECnet Phase V. It was originally thought that TCP/IP would gradually make way for the seven layer OSI architecture so an enhancement to IS-IS was developed called Integrated IS-IS also known as Dual IS-IS that could route both Connectionless-Mode Network Service (CLNS) as well as IP. Cisco IOS supports IS-IS authentication on 3 different levels; between neighbors, area- wide, and domain-wide, where each can be used by themselves or together. summary-address address mask {level-1 | level-1-2 | level-2} is used to configure IP address summarization.

  References: http://www.rhyshaden.com/isis.htm http://mynetworkingwiki.com/index.php/Configuring_IS-IS

• Question 616:

  Which three statements describe the characteristics of a VPLS architecture? (Choose three.)

  A. It forwards Ethernet frames.
  B. It maps MAC address destinations to IP next hops.
  C. It supports MAC address aging.
  D. It replicates broadcast and multicast frames to multiple ports.
  E. It conveys MAC address reachability information in a separate control protocol.
  F. It can suppress the flooding of traffic.
  A. It forwards Ethernet frames.
  C. It supports MAC address aging.
  D. It replicates broadcast and multicast frames to multiple ports.

  ---

  As a VPLS forwards Ethernet frames at Layer 2, the operation of VPLS is exactly the same as that found within IEEE 802.1 bridges in that VPLS will self learn source MAC address to port associations, and frames are forwarded based upon

  the destination MAC address. Like other 802.1 bridges, MAC address aging is supported.

  Reference:

  http://www.cisco.com/en/US/products/hw/routers/ps368/products_white_paper09186a0080 1f6084.shtml

• Question 617:

  DRAG DROP

  Drag and drop each BGP feature on the left to the corresponding function it performs on the right.

  Select and Place:

  

  

• Question 618:

  Refer to the exhibit.

  

  If router R1 is functioning as a DHCPv6 server and you enter the command show ipv6 dhcp binding, which two options are pieces of information in the output? (Choose two.)

  A. The IA PD
  B. The DUID
  C. The prefix pool
  D. The DNS server
  E. The Rapid-Commit setting
  A. The IA PD
  B. The DUID

  ---

  In the following example, the show ipv6 dhcp binding command shows information about two clients, including their DUIDs, IAPDs, prefixes, and preferred and valid lifetimes: Router# show ipv6 dhcp binding

  Client: FE80::202:FCFF:FEA5:DC39 (GigabitEthernet2/1/0) DUID. 000300010002FCA5DC1C IA PD. IA ID 0x00040001, T1 0, T2 0 Prefix: 3FFE:C00:C18:11::/68 preferred lifetime 180, valid lifetime 12345 expires at Nov 08 2002 02:24 PM (12320 seconds) Client: FE80::202:FCFF:FEA5:C039 (GigabitEthernet2/1/0) DUID. 000300010002FCA5C01C IA PD. IA ID 0x00040001, T1 0, T2 0 Prefix: 3FFE:C00:C18:1::/72 preferred lifetime 240, valid lifetime 54321 expires at Nov 09 2002 02:02 AM (54246 seconds) Prefix: 3FFE:C00:C18:2::/72 preferred lifetime 300, valid lifetime 54333 expires at Nov 09 2002 02:03 AM (54258 seconds) Prefix: 3FFE:C00:C18:3::/72 preferred lifetime 280, valid lifetime 51111

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dhcp/configuration/xe- 3s/dhcp-xe-3s-book/ip6-dhcp-prefix-xe.html

• Question 619:

  Which CoPP feature can you configure after applying the control-place command?

  A. Line card interfaces.
  B. Address filters
  C. Aggregates
  D. Drop policies.
  C. Aggregates

• Question 620:

  Which two tunneling techniques determine the IPv4 destination address on a per-packet basis? (Choose two.)

  A. 6to4 tunneling
  B. ISATAP tunneling
  C. manual tunneling
  D. GRE tunneling
  A. 6to4 tunneling
  B. ISATAP tunneling

  ---

  Tunnel Configuration Parameters by Tunneling Type

  Tunneling Type Tunnel Configuration Parameter Tunnel Mode Tunnel Source Tunnel Destination Interface Prefix or Address Manual ipv6ip An IPv4 address, or a reference to an interface on which IPv4 is configured. An IPv4 address. An IPv6 address. GRE/IPv4 gre ip An IPv4 address. An IPv6 address. IPv4compatible

  ipv6ip auto-tunnel

  Not required. These are all point-to-multipoint tunneling types. The IPv4 destination address is calculated, on a per-packet basis, from the IPv6 destination. Not required. The interface address is generated as ::tunnel-source/96.

  6to4

  ipv6ip 6to4

  An IPv6 address. The prefix must embed the tunnel source IPv4 address ISATAP

  ipv6ip isatap

  An IPv6 prefix in modified eui-64 format. The IPv6 address is generated from the prefix and the tunnel source IPv4 address.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/ios/ipv6/configuration/guide/12_4t/ipv6_12_4t_book/i p6-tunnel.html