Surprising 400 101 pdf

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Q161. DRAG DROP 

Drag and drop the argument of the ip cef load-sharing algorithm command on the left to the function it performs on the right. 

Answer: 


Q162. Which three statements are true about unicast RPF? (Choose three.) 

A. Unicast RPF requires CEF to be enabled. 

B. Unicast RPF strict mode works better with multihomed networks. 

C. Unicast RPF strict mode supports symmetric paths. 

D. Unicast RPF strict mode supports asymmetric paths. 

E. CEF is optional with Unicast RPF, but when CEF is enabled it provides better performance. 

F. Unicast RPF loose mode is typically used with ISP networks. 

Answer: A,C,F 


Q163. 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 


Q164. Which address is a MAC address that is mapped from an IPv6 address (RFC 2464)? 

A. 3333.FF17.FC0F 

B. FFFE. FF17.FC0F 

C. FF34.3333.FF17 

D. FF7E.FF17.FC0F 

Answer:

Explanation: 

An IPv6 packet with a multicast destination address DST, consisting of the sixteen octets DST through DST, is transmitted to the Ethernet multicast address whose first two octets are the value 3333 hexadecimal and whose last four octets are the last four octets of DST. 

Reference: https://tools.ietf.org/html/rfc2464 


Q165. DRAG DROP 

Drag each MPLS term on the left to the matching statement on the right. 

Answer: 


Q166. 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:

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 


Q167. Refer to the exhibit. 

Which statement is true about a VPNv4 prefix that is present in the routing table of vrf one and is advertised from this router? 

A. The prefix is advertised only with route target 100:1. 

B. The prefix is advertised with route targets 100:1 and 100:2. 

C. The prefix is advertised only with route target 100:3. 

D. The prefix is not advertised. 

E. The prefix is advertised with route targets 100:1, 100:2, and 100:3. 

Answer:

Explanation: 

The route target used for prefix advertisements to other routers is defined on the route-target export command, which shows 100:1 in this case for VPNv4 routes. 


Q168. Refer to the exhibit. 

Which statement is true? 

A. There is no issue with forwarding IPv6 traffic from this router. 

B. IPv6 traffic can be forwarded from this router, but only on Ethernet1/0. 

C. IPv6 unicast routing is not enabled on this router. 

D. Some IPv6 traffic will be blackholed from this router. 

Answer:

Explanation: 

Here we see that the IPV6 default route shows two different paths to take, one via Ethernet 1/0 and one via Ethernet 0/0. However, only Eth 1/0 shows a next hop IPV6 address (the link local IPV6 address). There is no link local next hop addressed known on Eth 0/0. Therefore, traffic to all destinations will be load balanced over the two paths, but only half of the IPv6 traffic will be sent to the correct upstream router. 


Q169. DRAG DROP 

Drag and drop the TACACS+ configuration command on the left to the correct function it performs on the right. 

Answer: 


Q170. You are configuring a DHCPv6 client for a DHCPv6 server with the prefix delegation feature. Which option is a result of the interface configuration when you enter the command ipv6 address autoconfig default? 

A. a static IPv6 default route pointing to the upstream DHCP server 

B. a static IPv6 default route pointing to the upstream DHCP relay 

C. a static IPv6 default route pointing to the upstream router 

D. a temporary stateless address, formed from the EUI-64 bit address and the prefix from the route advertisement of the upstream router 

Answer:


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