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Q171. Which is the way to enable the control word in an L2 VPN dynamic pseudowire connection on router R1? 

A. R1(config)# pseudowire-class cw-enable 

R1(config-pw-class)# encapsulation mpls 

R1(config-pw-class)# set control-word 

B. R1(config)# pseudowire-class cw-enable 

R1(config-pw-class)# encapsulation mpls 

R1(config-pw-class)# enable control-word 

C. R1(config)# pseudowire-class cw-enable 

R1(config-pw-class)# encapsulation mpls 

R1(config-pw-class)# default control-word 

D. R1(config)# pseudowire-class cw-enable 

R1(config-pw-class)# encapsulation mpls 

R1(config-pw-class)# control-word 

Answer:

Explanation: 

The following example shows how to enable the control word in an AToM dynamic pseudowire connection: 

Device(config)# pseudowire-class cw-enable 

Device(config-pw-class)# encapsulation mpls 

Device(config-pw-class)# control-word 

Device(config-pw-class)# exit 

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mpls/command/mp-cr-book/mp-a1.html 


Q172. 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. 


Q173. Which two options are actions that EEM can perform after detecting an event? (Choose two.) 

A. Place a port in err-disabled. 

B. Generate an SNMP trap. 

C. Reload the Cisco IOS Software. 

D. Send an SMS. 

Answer: B,C 

Explanation: 

action snmp-trap 

To specify the action of generating a Simple Network Management Protocol (SNMP) trap when an Embedded Event Manager (EEM) applet is triggered, use the action snmp-trap command in applet configuration mode. 

ction reload 

To specify the action of reloading the Cisco IOS software when an Embedded Event Manager (EEM) applet is triggered, use the action reload command in applet configuration mode. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2s/feature/guide/fs_eem2.html 


Q174. Refer to the exhibit. 

You are bringing a new MPLS router online and have configured only what is shown to bring LDP up. Assume that the peer has been configured in a similar manner. You verify the LDP peer state and see that there are no neighbors. What will the output of show mpls ldp discovery show? 

A. Interfaces: 

Ethernet0/0 (ldp): xmit 

B. Interfaces: 

Ethernet0/0 (ldp): xmit/recv 

LDP Id: 25.25.25.2:0; IP addr: 192.168.12.2 

C. Interfaces: 

Ethernet0/0 (ldp): xmit/recv 

LDP Id: 192.168.12.2:0; no route 

D. Interfaces: 

Ethernet0/0 (ldp): xmit/recv 

LDP Id: 25.25.25.2:0; no route 

Answer:


Q175. Assume that the following MAC addresses are used for the bridge ID MAC address by four different switches in a network. Which switch will be elected as the spanning-tree root bridge? 

A. SwitchA uses MAC 1000.AA-AA-AA-AA-AA-AA. 

B. SwitchB uses MAC 2000.BB-BB-BB-BB-BB-BB. 

C. SwitchC uses MAC 3000.CC-CC-CC-CC-CC-CC. 

D. SwitchD uses MAC 4000.DD-DD-DD-DD-DD-DD. 

Answer:

Explanation: 

The switch with the highest switch priority (the lowest numerical priority value) is elected as the root switch. If all switches are configured with the default priority (32768), the switch with the lowest MAC address in the VLAN becomes the root switch. 

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_53_se/configuration/guide/2960scg/swstp.html 


Q176. Refer to the exhibit. 

Service provider SP 1 is running the MPLS-VPN service. The MPLS core network has MP-BGP configured with RR-1 as route reflector. What will be the effect on traffic between PE1 and PE2 if router P1 goes down? 

A. No effect, because all traffic between PE1 and PE2 will be rerouted through P2. 

B. No effect, because P1 was not the only P router in the forwarding path of traffic. 

C. No effect, because RR-1 will find an alternative path for MP-BGP sessions to PE-1 and PE-2. 

D. All traffic will be lost because RR-1 will lose the MP-BGP sessions to PE-1 and PE-2. 

Answer:

Explanation: 

If the connection to the route reflector goes down, then routes from PE-1 will not get advertised to PE2, and vice versa. Route reflectors are critical in an MPLS VPN such as the one shown, which is why it is a best practice to have multiple route reflectors in this kind of network. 


Q177. Refer to the exhibit. 

If EIGRP is configured between two routers as shown in this output, which statement about their EIGRP relationship is true? 

A. The routers will establish an EIGRP relationship successfully. 

B. The routers are using different authentication key-strings. 

C. The reliability metric is enabled. 

D. The delay metric is disabled. 

Answer:

Explanation: 

The 5 K values used in EIGRP are: 

K1 = Bandwidth modifier 

K2 = Load modifier 

K3 = Delay modifier 

K4 = Reliability modifier 

K5 = Additional Reliability modifier 

However, by default, only K1 and K3 are used (bandwidth and delay). In this output we see that K1, K3, and K4 (Reliability) are all set. 


Q178. 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 

Answer: A,B 

Explanation: 

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 


Q179. Refer to the exhibit. 

Notice that debug ip bgp updates have been enabled. What can you conclude from the debug output? 

A. This is the result of the clear ip bgp 10.1.3.4 in command. 

B. This is the result of the clear ip bgp 10.1.3.4 out command. 

C. BGP neighbor 10.1.3.4 performed a graceful restart. 

D. BGP neighbor 10.1.3.4 established a new BGP session. 

Answer:

Explanation: 

If you enter the clear ip bgp out command for a BGP peer, that router resends its BGP prefixes to that peer. This does not cause a change in the best path on the receiving BGP peer. Hence, there is no change in the Table Version on that peer. 

When you run the debug ip bgp updates on the receiving router, you see: 

BGP(0): 10.1.3.4 rcvd UPDATE w/ attr: nexthop 10.1.3.4, origin i, metric 0, merged path 4, AS_PATH 

BGP(0): 10.1.3.4 rcvd 10.100.1.1/32...duplicate ignored 

The received update is recognized as a duplicate, so it is ignored and no best path change occurs. 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/116511-technote-tableversion-00.html 


Q180. Which three statements about IPsec VTIs are true? (Choose three.) 

A. IPsec sessions require static mapping to a physical interface. 

B. They can send and receive multicast traffic. 

C. They can send and receive traffic over multiple paths. 

D. They support IP routing and ACLs. 

E. They can send and receive unicast traffic. 

F. They support stateful failover. 

Answer: B,D,E