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Q231. With which ISs will an IS-IS Level 1 IS exchange routing information? 

A. Level 1 ISs 

B. Level 1 ISs in the same area 

C. Level 1 and Level 2 ISs 

D. Level 2 ISs 

Answer:

Explanation: 

IS-IS differs from OSPF in the way that "areas" are defined and routed between. IS-IS routers are designated as being: Level 1 (intra-area); Level 2 (inter area); or Level 1-2 (both). Level 2 routers are inter area routers that can only form relationships with other Level 2 routers. Routing information is exchanged between Level 1 routers and other Level 1 routers, and Level 2 routers only exchange information with other Level 2 routers. Level 1-2 routers exchange information with both levels and are used to connect the inter area routers with the intra area routers. 

Reference: http://en.wikipedia.org/wiki/IS-IS 


Q232. Which two options describe two functions of a neighbor solicitation message? (Choose two.) 

A. It requests the link-layer address of the target. 

B. It provides its own link-layer address to the target. 

C. It requests the site-local address of the target. 

D. It provides its own site-local address to the target. 

E. It requests the admin-local address of the target. 

F. It provides its own admin-local address to the target. 

Answer: A,B 

Explanation: 

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 

After receiving the neighbor solicitation message, the destination node replies by sending a neighbor advertisement message, which has a value of 136 in the Type field of the ICMP packet header, on the local link. The source address in the neighbor advertisement message is the IPv6 address of the node (more specifically, the IPv6 address of the node interface) sending the neighbor advertisement message. The destination address in the neighbor advertisement message is the IPv6 address of the node that sent the neighbor solicitation message. The data portion of the neighbor advertisement message includes the link-layer address of the node sending the neighbor advertisement message. After the source node receives the neighbor advertisement, the source node and destination node can communicate. 

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 


Q233. Which two statements about MAC Authentication Bypass are true? (Choose two.) 

A. Traffic from an endpoint is authorized to pass after MAB authenticates the MAC address of the endpoint. 

B. During the learning stage, the switch examines multiple packets from the endpoint to determine the MAC address of the endpoint. 

C. After the switch learns the MAC address of the endpoint, it uses TACACS+ to authenticate it. 

D. After learning a source MAC address, it sends the host a RADIUS Account-Request message to validate the address. 

E. The MAC address of a device serves as its user name and password to authenticate with a RADIUS server. 

Answer: A,E 


Q234. Refer to the exhibit. 

Which two configuration changes enable you to log in to the router? (Choose two.) 

A. Configure a user name and password on the device. 

B. Modify the default login authentication group to use the terminal line password. 

C. Remove the terminal line password on the console line. 

D. Modify the terminal lines to include transport input none. 

E. Configure the terminal lines to use the local user database. 

Answer: A,B 


Q235. Which two statements about Metro Ethernet services are true? (Choose two.) 

A. EPL is a point-to-point service from one customer site to another across an MPLS 

backbone. 

B. EVPL is a multipoint service that emulates a LAN over an MPLS backbone. 

C. EPLAN is a multipoint service that emulates a LAN over an MPLS backbone. 

D. EVPL is a point-to-point service from one customer site to another across an MPLS backbone. 

E. ELAN is a point-to-point service from one customer site to another across an MPLS backbone. 

F. EVPL is a multipoint service with a root node that is suitable for multicast services. 

Answer: A,B 


Q236. Refer to the exhibit. 

Which statement is true? 

A. It is impossible for the destination interface to equal the source interface. 

B. NAT on a stick is performed on interface Et0/0. 

C. There is a potential routing loop. 

D. This output represents a UDP flow or a TCP flow. 

Answer:

Explanation: 

In this example we see that the source interface and destination interface are the same (Et0/0). Typically this is seen when there is a routing loop for the destination IP address. 


Q237. Which regular expression will match prefixes that originated from AS200? 

A. ^$ 

B. ^200_ 

C. _200$ D. ^200) 

E. _200_ 

Answer:

Explanation: 

Example on how to deny all prefixes originated in Autonomous System 200 

router bgp 100 

neighbor 10.1.1.1 remote-as 65535 

neighbor 10.1.1.1 route-map map1 in 

route-map map1 permit 10 

match as-path 1 

ip as-path access-list 5 deny _200$ 

ip as-path access-list 5 permit .* 

Reference: http://www.cisco.com/c/en/us/td/docs/ios/termserv/configuration/guide/12_4t/tsv_12_4t_bo ok/tsv_reg_express.html 


Q238. Refer to the exhibit. 

Assuming that the peer is configured correctly and the interface is up, how many neighbors will be seen in the EIGRPv6 neighbor table on this IPv6-only router? 

A. one neighbor, which will use a local router-id of 6010. AB8. . /64 

B. one neighbor, which will use a local router-id of 6020. AB8. . /64 

C. none, because EIGRPv6 only supports authenticated peers 

D. none, because of the mismatch of timers 

E. none, because there is no EIGRP router ID configured 

Answer:

Explanation: 

Configuring EIGRP for IPv6 has some restrictions; they are listed below: 

. The interfaces can be directly configured with EIGRP for IPv6, without the use of a global IPv6 address. There is no network statement in EIGRP for IPv6. 

. The router ID needs to be configured for an EIGRPv6 protocol instance before it can run. 

. EIGRP for IPv6 has a shutdown feature. Ensure that the routing process is in "no shut" mode to start running the protocol. 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/113267-eigrp-ipv6-00.html 


Q239. Which three protocols can use enhanced object tracking? (Choose three.) 

A. HSRP 

B. Proxy-ARP 

C. VRRP 

D. GLBP 

E. NTP 

F. DHCP 

Answer: A,C,D 

Explanation: 

The Enhanced Object Tracking feature separates the tracking mechanism from HSRP and creates a separate standalone tracking process that can be used by other processes and HSRP. This feature allows tracking of other objects in addition to the interface line-protocol state. A client process such as HSRP, Virtual Router Redundancy Protocol (VRRP), or Gateway Load Balancing Protocol (GLBP), can register its interest in tracking objects and then be notified when the tracked object changes state. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/15-mt/iap-15-mt-book/iap-eot.html 


Q240. Which set of commands conditionally advertises 172.16.0.0/24 as long as 10.10.10.10/32 is in the routing table? 

A) 

B) 

C) 

D) 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Explanation: 

Advertise maps are used for conditional routing to advertise specified prefixes if something which is specified in exist map exists. In our question we need to advertise 172.16.0.0/24 if 10.10.10.10/32 exists in the routing table so we have to use commanD. “neighbor x.x.x.x advertise-map <prefix-list of 172.16.0.0/24> exist-map <prefix-list of 10.10.10.10/32>”. Therefore B is correct.