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Q351. Refer to the exhibit.
Which two route types are advertised by a router with this configuration? (Choose two.)
A. connected
B. external
C. summary
D. static
E. redistributed
Answer: A,C
Q352. Which two statements about the max-age time in IS-IS are true? (Choose two.)
A. The IS-IS max-age time is 20 minutes by default.
B. The IS-IS max-age time is 60 minutes by default.
C. The IS-IS max-age time increments from zero to max-age.
D. The IS-IS max-age time decrements from max-age to zero.
Answer: A,D
Q353. A service provider is deploying L2VPN LAN services in its MPLS cloud. Which statement is true regarding LDP signaling and autodiscovery?
A. LDP signaling requires that each PE is identified, and that an LDP session is active with its P neighbor for autodiscovery to take place.
B. LDP signaling requires that each P is identified, and that a targeted LDP session is active for autodiscovery to take place.
C. LDP signaling requires that each PE is identified, and that a targeted LDP session with a BGP route reflector is active for autodiscovery to take place.
D. LDP signaling requires that each PE is identified, and that a targeted LDP session is active for autodiscovery to take place.
Answer: D
Explanation:
LDP signaling requires that each PE is identified and a targeted LDP session is active for autodiscovery to take place. Although the configuration can be automated using NMS/OSS the overall scalability of the solution is poor as a PE must be associated with all other PEs for LDP discovery to work, which can lead to a large number of targeted LDP sessions (n2), which may be largely unused as not all VPLS will be associated with every PE. The security attributes of LDP are reasonably good, although additional configuration is required to prevent unauthorized sessions being set up. Although LDP can signal additional attributes, it requires additional configuration either from an NMS/OSS or static configuration.
Reference: http://www.cisco.com/en/US/products/hw/routers/ps368/products_white_paper09186a0080 1f6084.shtml
Q354. Refer to the exhibit.
When the link between RtrB and RtrC goes down, multicast receivers stop receiving traffic from the source for multicast group 229.1.1.1.Which solution will resolve this?
A. adding a static mroute on RtrB and RtrF
B. adding a static unicast route on RtrB and RtrF
C. creating a GRE tunnel between RtrB and RtrD
D. enabling PIM sparse mode on both ends of the link between RtrB and RtrF
Answer: D
Explanation:
For multicast traffic to flow, PIM must be enabled on all routers in the path of the multicast stream.
Q355. Which two statements about OSPFv3 are true? (Choose two.)
A. It supports unicast address families for IPv4 and IPv6.
B. It supports unicast address families for IPv6 only.
C. It supports only one address family per instance.
D. It supports the use of a cluster ID for loop prevention.
E. It supports multicast address families for IPv4 and IPv6.
F. It supports multicast address families for IPv6 only.
Answer: A,C
Leading 400-101 practice exam:
Q356. What is the destination MAC address of a BPDU frame?
A. 01-80-C2-00-00-00
B. 01-00-5E-00-00-00
C. FF-FF-FF-FF-FF-FF
D. 01-80-C6-00-00-01
Answer: A
Explanation:
The root-bridge election process begins by having every switch in the domain believe it is the root and claiming it throughout the network by means of Bridge Protocol Data Units (BPDU). BPDUs are Layer 2 frames multicast to a well-known MAC address in case of IEEE STP (01-80-C2-00-00-00) or vendor-assigned addresses, in other cases.
Reference: http://www.ciscopress.com/articles/article.asp?p=1016582
Q357. Which three types of address-family configurations are supported in EIGRP named mode? (Choose three.)
A. address-family ipv4 unicast
B. address-family vpnv4
C. address-family ipv6 unicast
D. address-family ipv6 multicast
E. address-family vpnv6
F. address-family ipv4 multicast
Answer: A,C,F
Q358. Refer to the exhibit.
If you change the Spanning Tree Protocol from pvst to rapid-pvst, what is the effect on the interface Fa0/1 port state?
A. It transitions to the listening state, and then the forwarding state.
B. It transitions to the learning state and then the forwarding state.
C. It transitions to the blocking state, then the learning state, and then the forwarding state.
D. It transitions to the blocking state and then the forwarding state.
Answer: C
Explanation:
First, the port will transition to the blocking state, immediately upon the change, then it will transition to the new RSTP states of learning and forwarding.
Port States
There are only three port states left in RSTP that correspond to the three possible operational states. The 802.1D disabled, blocking, and listening states are merged into a unique 802.1w discarding state.
STP (802.1D) Port State
RSTP (802.1w) Port State
Is Port Included in Active Topology?
Is Port Learning MAC Addresses?
Disabled
Discarding
No
No
Blocking
Discarding
No
No
Listening
Discarding
Yes
No
Learning
Learning
Yes
Yes
Forwarding
Forwarding
Yes
Yes
Q359. Which command correctly configures standby tracking for group 1 using the default decrement priority value?
A. standby 1 track 100
B. standby 1 track 100 decrement 1
C. standby 1 track 100 decrement 5
D. standby 1 track 100 decrement 20
Answer: A
Q360. Which two options are signaling protocols that are used in MPLS? (Choose two.)
A. LDP
B. RSVP
C. BFD
D. LISP
E. CLNS
F. CDP
Answer: A,B
Explanation:
* Signaling is the means by which LSRs all along the path know that they are a part of a given LSP. It is a signaling function by which the LSR knows that the internal transit path for the LSP depicted goes from Interface 2 to Interface 4.
* Label distribution is the means by which an LSR tells an upstream LSR what label value to use for a particular LSP.
There are four protocols that can perform the label distribution function:
* Label Distribution Protocol (LDP)
* Resource Reservation Protocol with Traffic Engineering Extensions (RSVP-TE)
* Constraint-Based Routed LDP (CR-LDP)
* Multiprotocol BGP
LDP and RSVP-TE are the two most commonly used label distribution protocols
Reference: http://www.networkworld.com/article/2237487/cisco-subnet/understanding-mpls-label-distribution.html
