Exam A QUESTION 1
Which of the following events can NOT be tuned via router configuration to provide for faster convergence following a link failure?
A. Failure detection
B. IGP LSP/LSA origination
C. Per-hop flooding time of new link state
D. Number of hops that need to be notified of new link state
E. Failure reporting
Correct Answer: D QUESTION 2
What best explains the BGP route-reflector function?
A. None of the above.
B. BGP route-reflector does not have to be in the forwarding path of data coming from its clients.
C. BGP route-reflector will stop reflecting the routes if they’re not directly-connected clients.
D. BGP route-reflector should be in forwarding path of data coming from its clients.
Correct Answer: B QUESTION 3
In Any Transport over MPLS (AtoM) Control word is an optional 4-byte field used in the pseudowire packet. The control word carries generic and Layer 2 payload-specific information to emulate L2 packets correctly. In pseudowire packet, where is this Control Word inserted ?
A. Inserted between the MPLS label stack and the Layer 3 payload
B. Inserted between the MPLS label stack and the Layer 3 Header
C. Inserted between the MPLS label stack and the Layer 2 payload
D. Inserted between the MPLS label stack and the Layer 2 header
Correct Answer: C QUESTION 4
What is the proper MP-BGP configuration between the shown PE routers to implement MPLS VPNs on PE-R2 ?
A. None of the above
B. router bgp 1 neighbor 50.0.0.4 remote-as 1 neighbor 50.0.0.4 update-source Loopback0 no auto-summary ! address-family ipv4 neighbor 50.0.0.4 activate neighbor 50.0.0.4 send-community extended exit-address-family
C. router bgp 1 neighbor 50.0.0.4 remote-as 1 neighbor 50.0.0.4 update-source Loopback0 no auto-summary ! address-family vpnv4 neighbor 50.0.0.4 activate neighbor 50.0.0.4 send-community extended exit-address-family
D. router bgp 1 neighbor 50.0.0.4 remote-as 1 neighbor 50.0.0.4 update-source Loopback0 no auto-summary ! address-family vpnv4 unicast multicast neighbor 50.0.0.4 activate neighbor 50.0.0.4 send-community extended exit-address-family
Correct Answer: C
QUESTION 5
What is the importance of using Virtual Output Queues on ingress Line Cards in a high- end router?
A. Increases forwarding performance
B. Simplifies configuration
C. Prevents head-of-line blocking
D. Uses less memory
Correct Answer: C
QUESTION 6
Which of the following statements about MD5 Routing Updates authentication is valid? (Select two)
A. The MD5 algorithm inputs the routing updates of arbitrary length and outputs a 128- bit hash
B. The MD5 algorithm inputs the routing updates of every 64bit length and outputs an 8-bit hash
C. Multiple keys are supported
D. Routing updates packets are delivered in encrypted messages
E. Shared secret keys are delivered in encrypted messages
Correct Answer: AC
QUESTION 7
In which of the following BGP-related events is an End-of-RIB (EOR) message sent?
A. Just before sending a CEASE message to tear down the session.
B. During capability negotiation.
C. During initial convergence.
D. Following a link flap in the BGP speaker’s AS.
E. Following a Route Processor Switchover.
Correct Answer: CE
QUESTION 8
What is the requirement of Remote Triggered Black Hole (RTBH ) filtering?
A. ISIS updates exchange between trigger router and black hole router
B. EBGP updates exchange between trigger router and black hole router
C. None of above
D. OSPF updates exchange between trigger router and black hole router
E. IBGP updates exchange between trigger router and black hole router
Correct Answer: E
QUESTION 9
RIPv2 differs from RIPv1 in that:
A. it uses multicast address 224.0.0.10,instead of broadcast.
B. it uses multicast address 224.0.0.9,instead of broadcast.
C. it can use either multicast or broadcast addresses,instead of just broadcast.
D. it sends incremental updates,instead of periodic updates.
E. it is classless,instead of classful
F. it supports authentication,and RIPv1 does not
Correct Answer: BEF
QUESTION 10
Which 4 statements regarding MPLS Label Stack Encoding is true?
A. A value of 4 represents the “Implicit NULL Label.”
B. A value of 0 represents the “IPv4 Explicit NULL Label.”
C. A value of 1 represents the “Router Alert Label”. The use of this label is analogous to the use of the “Router Alert Option” in IP packets (for example, ping with record route option).
D. A value of 2 represents the “IPv6 Explicit NULL Label”
E. A value of 1 represents the “IPv1 Explicit NULL Label”
F. A value of 3 represents the “Implicit NULL Label”
Correct Answer: BCDF
