CCIE SP Written Exam (Version 3.0)
Number: 350-029
Passing Score: 790
Time Limit: 120 min
File Version: 421Q+69
QUESTION 91
What is the order of preference for these commands when all of them are applied to one neighbor in the BGP inbound filter direction?
A. prefix-list/distribute-list, filter-list, route-map
B. route-map, filter-list, prefix-list/distribute-list
C. route-map, prefix-list/distribute-list, filter-list
D. filter-list, prefix-list/distribute-list, route-map
E. prefix-list/distribute-list, route-map, filter-list
Correct Answer: B
QUESTION 92
Which two statements about the bgp deterministic-med and bgp always-compare-med commands are true? (Choose two)
A. The bgp deterministic-med command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS
path length
B. The bgp always-compare command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS
path system.
C. Enabling the bgp deterministic-med command ensures the comparison of the MED variable when choosing routes advertised by different peers in the same
autonomous system.
D. Enabling the bgp always-compare-med command ensures the comparison of the MED variable for paths from neighbors in different autonomous systems.
E. The bgp deterministic-med and bgp always-compare-med commands are enabled by defult.
Correct Answer: CD
QUESTION 93
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 94
Which of the following are steps to configure destination-based Remote Triggered Black Hole (RTBH) filtering? (Choose three.)
A. Configure BGP between trigger and black hole routers.
B. Configure OSPF between trigger router and black hole routes
C. Configure all edge routers with static (reserved) host route to Null0
D. Configure on trigger router to advertise victim host route with community
E. Activate black hole by redistributing route for victim into BGP with next-hop set to the static (reserved) hostroute configured on edge routers.
Correct Answer: ACE
QUESTION 95
Which statement about Remotely Triggered Black Hole (RTBH) is true?
A. Route tagging is one of the techniques used by RTBH
B. It is used for BGP authentication
C. It cannot work with static routes
D. It uses extended ACLs for blocking attacks by creating a black hole
E. Before configuring RTBH. LDP must be enabled on the interface
Correct Answer: A
QUESTION 96
Refer to the exhibit.
The SP network is configuring Remote Filtering to protect hosts on network 152.68.19.0/24. Which routers should be configured to the sinkhole router?
A. L and K
B. A, B, F, G, and H
C. C and D
D. A, B, G, and H
E. A, D, F, G, and L
Correct Answer: A
QUESTION 97
Refer to the exhibit.
If the SP network is configuring RTBH filtering to protect hosts on the 152.68.19.0/24 network, which router should be configured as the black hole activating
router?
A. F
B. C
C. D
D. L
E. A
F. K
Correct Answer: A
QUESTION 98
Which three protocols use TLVs to carry attributes? (Choose three.)
A. Cisco Discovery Protocol
B. Label Discovery Protocol
C. Border Gateway Protocol
D. OSPF
E. RIP version 2
Correct Answer: ABC
QUESTION 99
Which three statements about BGP confederation and route reflectors are true? (Choose three)
A. Clusters are used in confederation schemes to avoid loops.
B. BGP network can have a confederation within a route reflector area.
C. An internal BGP network cannot have a route reflector within a confederation.
D. An internal BGP network can have a route reflector within a confederation.
E. Clusters are used in route reflector schemes to avoid loops.
F. BGP network cannot have a confederation within a route reflector area.
Correct Answer: DEF
QUESTION 100
Which three BGP attributes are carried by TLV? (Choose three)
A. Local Preference
B. Weight
C. Origin
D. Network Layer Reachability Information (NLRI)
E. Multiple Exit Discriminator (MED)
Correct Answer: ADE
QUESTION 101
Which three statements about the BGP next-hop attribute are true? (Choose three.)
A. EBGP sessions between confederation sub ASs do not modify the next-hop attribute.
B. By default, iBGP sessions change the next-hop attribute learned from eBGP peers to self address.
C. By default, the next-hop attribute is not changed when a prefix is reflected by the route reflector
D. EBGP sessions between confederation sub ASs change the next-hop attribute to peer address.
E. By default, iBGP sessions preserve the next-hop attribute learned from eBGP peers.
Correct Answer: ACE
QUESTION 102
Which two statements are true about SAFI & AFI?
A. Subsequent Address Family identifier (SAFI) provides additional information about the type of the Network Layer ports carried in the BGP update
B. Address Family identifier (AFI) field carries the identity of the Network Layer ports for which the BGP speaker intends to advertise multiple paths
C. Subsequent Address Family identifier (SAFI) provides additional information about the type of the Network Layer Reachability Information carried in the
attribute
D. Address Family identifier (AFI) carries the identity of the Network Layer protocol for which the BGP speaker intends to advertise multiple paths
Correct Answer: CD
QUESTION 103
What are the Address Family Identifier (AFI) and Subsequent Address Family Identifier (SAFI) values for VPNv6?
A. AFI is 2, SAFI is 96
B. AFI is 2, SAFI is 64
C. AFI is 1, SAFI is 64
D. AFI is 1, SAFI is 128
E. AFI is 2, SAFI is 128
Correct Answer: E
QUESTION 104
In which two ways does the BGP graceful capability preserve prefix information during a restart? (Choose two)
A. The peer router immediately removes the BGP routers that it learned from the restarting router from its BGP routing tables.
B. The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router
waits to receive updates from the neighboring routers.
C. The peer router sends an end-of-RIB message to the restarting router.
D. The restarting router removes any stale prefixes after the timer for stale entries expires.
E. The restarting router does not remove any stale prefixes after the timer for stale entries expires.
Correct Answer: BD
QUESTION 105
What are the two benefits of graceful restart? (Choose two)
A. Graceful restart allows session information recovery without disruption to the network.
B. A node can perform a graceful restart to help a neighbor recover its state. The label bindings are kept on state information, which helps the failed node recover
faster and does not affect the current forward traffic.
C. Graceful restart allows a node to recover state from its neighbor when there is no RP or before the device undergoes SSO.
D. Graceful restart does not allow session information recovery.
E. During a graceful restart, the router removes any stale prefixes after a timer for stale entries expires
Correct Answer: AB
QUESTION 106
Which BGP attribute can be used to influence inbound traffic flow?
A. cluster ID
B. Weight
C. MED
D. local preference
E. aggregate
Correct Answer: C
What method of streaming live video is the least taxing on bandwidth in a large enterprise environment?
A. TCP
B. UDP
C. HTTP
D. Multicast
Correct Answer: D
QUESTION 110
Which three statements about anycast RP are true? (Choose three.)
A. MSDP is running between anycast RPs.
B. Anycast RP provides redundancy and load-sharing capabilities
C. Multicast BGP is running between anycast RPs.
D. In anycast RP, two or more RPs are configured with the same multicast IP address on loopback interfaces
E. In anycast RP, two or more RPs are configured with the same unicast IP address on loopback interfaces
Correct Answer: ABE
QUESTION 111
Which are correct descriptions and configurations of Anycast RP? (Choose three).
A. In Anycast RP, two or more RPs are configured with the same IP address on loopback interfaces.
B. Anycast RP provides redundancy and load-sharing capabilities.
C. Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip pim rpaddress 1.1.1.1
D. Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip rp-address pim 1.1.1.1
E. Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip anycast-rp pim 1.1.1.1
Correct Answer: ABC
QUESTION 112
What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations?
A. immediately after receiving the first packet on the shared tree for a given (S, G)
B. after receiving over 1 kb/s traffic on the shared tree for a given (S, G)
C. 10 seconds after receiving the first packet on the shared tree for a given (S, G)
D. 30 seconds after receiving the first packet on the shared tree for a given (S, G)
E. after receiving over 10 kb/s traffic on the shared tree for a given (S, G)
Correct Answer: A
QUESTION 113
Cisco IOS XR Software Multicast Routing Implementation, which three features are supported in IPv6 on Cisco CRS router? (Choose three.)
A. PIM-SSM
B. Aggregation multicast
C. PIM-Bidirectional
D. OOR handling
E. Integrated multicast
F. Multicast NSF
Correct Answer: ACF
QUESTION 114
Which of the following statements is correct regarding PIM Sparse Mode operations?
A. Receivers are "registered" with RP by their first-hop router
B. It supports shared trees only assuming all hosts want the multicast traffic
C. From the RP, traffic flows down a Source Tree to each receiver
D. It does not support all underlying unicast routing protocols like BGP
E. Receivers are "joined" to the Shared Tree (rooted the rp) by their local Designated Router (DR)
Correct Answer: E
QUESTION 115
Which two statements about RPF checks in Multicast Source Discovery Protocol (MSDP) are true? (Choose two)
A. RPF check should be done against the route to the source of the corresponding PIM-SM domain.
B. Checking session advertisement (SA) messages causes messages looping.
C. The RPF check ensures that there is a working redundancy for anycast RPs.
D. RPF check should be done against the route to the RP of the PIM-SM domain that originated the SA.
E. It prevents message looping, and session advertisement (SA) messages must be RPF checked.
Correct Answer: DE
QUESTION 116
What type of IPv6 address is this address FF05::2:260:8FF:FE52:F9D8?
A. multicast temporary node local
B. multicast temporary site local
C. unicast permanent link local
D. multicast permanent node link local
E. multicast permanent site local
F. unicast temporary link local
Correct Answer: E
QUESTION 117
In PIM-SM operations, the first router connected to the multicast source sends the Register message to which device?
A. Designated Router (DR)
B. Multicast source
C. Multicast receiver
D. RP mapping agent
E. RP
Correct Answer: E
QUESTION 118
Which three statements about bidirectional PIM are true? (Choose three)
A. Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes multiple paths in a redundant network topology.
B. It does not require any traffic signaling in the protocol
C. Membership to a bidirectional group is signaled using explicit Join messages.
D. It maintains source-specific forwarding state.
E. It reduces memory, bandwidth, and CPU requirements
Correct Answer: BCE
QUESTION 119
Which of the following technologies can improve convergence time following a link failure in a service provider network? (Choose two.)
A. RSVP
B. MPLS TE FR
C. MPLS VPN
D. SNMP
E. BFD
F. VPLS
Correct Answer: BE
QUESTION 120
You are about to design a very fast convergence time on a SP network. Which feature would you utilize to declare a link failure within less than two seconds of the
fault on a link?
A. fast convergence SFP
B. MTU discovery
C. redundancy links
D. keepalive
E. carrier delay
Correct Answer: E
What is the order of preference for these commands when all of them are applied to one neighbor in the BGP inbound filter direction?
A. prefix-list/distribute-list, filter-list, route-map
B. route-map, filter-list, prefix-list/distribute-list
C. route-map, prefix-list/distribute-list, filter-list
D. filter-list, prefix-list/distribute-list, route-map
E. prefix-list/distribute-list, route-map, filter-list
Correct Answer: B
QUESTION 92
Which two statements about the bgp deterministic-med and bgp always-compare-med commands are true? (Choose two)
A. The bgp deterministic-med command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS
path length
B. The bgp always-compare command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS
path system.
C. Enabling the bgp deterministic-med command ensures the comparison of the MED variable when choosing routes advertised by different peers in the same
autonomous system.
D. Enabling the bgp always-compare-med command ensures the comparison of the MED variable for paths from neighbors in different autonomous systems.
E. The bgp deterministic-med and bgp always-compare-med commands are enabled by defult.
Correct Answer: CD
QUESTION 93
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 94
Which of the following are steps to configure destination-based Remote Triggered Black Hole (RTBH) filtering? (Choose three.)
A. Configure BGP between trigger and black hole routers.
B. Configure OSPF between trigger router and black hole routes
C. Configure all edge routers with static (reserved) host route to Null0
D. Configure on trigger router to advertise victim host route with community
E. Activate black hole by redistributing route for victim into BGP with next-hop set to the static (reserved) hostroute configured on edge routers.
Correct Answer: ACE
QUESTION 95
Which statement about Remotely Triggered Black Hole (RTBH) is true?
A. Route tagging is one of the techniques used by RTBH
B. It is used for BGP authentication
C. It cannot work with static routes
D. It uses extended ACLs for blocking attacks by creating a black hole
E. Before configuring RTBH. LDP must be enabled on the interface
Correct Answer: A
QUESTION 96
Refer to the exhibit.
The SP network is configuring Remote Filtering to protect hosts on network 152.68.19.0/24. Which routers should be configured to the sinkhole router?
A. L and K
B. A, B, F, G, and H
C. C and D
D. A, B, G, and H
E. A, D, F, G, and L
Correct Answer: A
QUESTION 97
Refer to the exhibit.
If the SP network is configuring RTBH filtering to protect hosts on the 152.68.19.0/24 network, which router should be configured as the black hole activating
router?
A. F
B. C
C. D
D. L
E. A
F. K
Correct Answer: A
QUESTION 98
Which three protocols use TLVs to carry attributes? (Choose three.)
A. Cisco Discovery Protocol
B. Label Discovery Protocol
C. Border Gateway Protocol
D. OSPF
E. RIP version 2
Correct Answer: ABC
QUESTION 99
Which three statements about BGP confederation and route reflectors are true? (Choose three)
A. Clusters are used in confederation schemes to avoid loops.
B. BGP network can have a confederation within a route reflector area.
C. An internal BGP network cannot have a route reflector within a confederation.
D. An internal BGP network can have a route reflector within a confederation.
E. Clusters are used in route reflector schemes to avoid loops.
F. BGP network cannot have a confederation within a route reflector area.
Correct Answer: DEF
QUESTION 100
Which three BGP attributes are carried by TLV? (Choose three)
A. Local Preference
B. Weight
C. Origin
D. Network Layer Reachability Information (NLRI)
E. Multiple Exit Discriminator (MED)
Correct Answer: ADE
QUESTION 101
Which three statements about the BGP next-hop attribute are true? (Choose three.)
A. EBGP sessions between confederation sub ASs do not modify the next-hop attribute.
B. By default, iBGP sessions change the next-hop attribute learned from eBGP peers to self address.
C. By default, the next-hop attribute is not changed when a prefix is reflected by the route reflector
D. EBGP sessions between confederation sub ASs change the next-hop attribute to peer address.
E. By default, iBGP sessions preserve the next-hop attribute learned from eBGP peers.
Correct Answer: ACE
QUESTION 102
Which two statements are true about SAFI & AFI?
A. Subsequent Address Family identifier (SAFI) provides additional information about the type of the Network Layer ports carried in the BGP update
B. Address Family identifier (AFI) field carries the identity of the Network Layer ports for which the BGP speaker intends to advertise multiple paths
C. Subsequent Address Family identifier (SAFI) provides additional information about the type of the Network Layer Reachability Information carried in the
attribute
D. Address Family identifier (AFI) carries the identity of the Network Layer protocol for which the BGP speaker intends to advertise multiple paths
Correct Answer: CD
QUESTION 103
What are the Address Family Identifier (AFI) and Subsequent Address Family Identifier (SAFI) values for VPNv6?
A. AFI is 2, SAFI is 96
B. AFI is 2, SAFI is 64
C. AFI is 1, SAFI is 64
D. AFI is 1, SAFI is 128
E. AFI is 2, SAFI is 128
Correct Answer: E
QUESTION 104
In which two ways does the BGP graceful capability preserve prefix information during a restart? (Choose two)
A. The peer router immediately removes the BGP routers that it learned from the restarting router from its BGP routing tables.
B. The router establishes BGP sessions with other routers and relearns the BGP routes from others that are also capable of graceful restart. The restarting router
waits to receive updates from the neighboring routers.
C. The peer router sends an end-of-RIB message to the restarting router.
D. The restarting router removes any stale prefixes after the timer for stale entries expires.
E. The restarting router does not remove any stale prefixes after the timer for stale entries expires.
Correct Answer: BD
QUESTION 105
What are the two benefits of graceful restart? (Choose two)
A. Graceful restart allows session information recovery without disruption to the network.
B. A node can perform a graceful restart to help a neighbor recover its state. The label bindings are kept on state information, which helps the failed node recover
faster and does not affect the current forward traffic.
C. Graceful restart allows a node to recover state from its neighbor when there is no RP or before the device undergoes SSO.
D. Graceful restart does not allow session information recovery.
E. During a graceful restart, the router removes any stale prefixes after a timer for stale entries expires
Correct Answer: AB
QUESTION 106
Which BGP attribute can be used to influence inbound traffic flow?
A. cluster ID
B. Weight
C. MED
D. local preference
E. aggregate
Correct Answer: C
What method of streaming live video is the least taxing on bandwidth in a large enterprise environment?
A. TCP
B. UDP
C. HTTP
D. Multicast
Correct Answer: D
QUESTION 110
Which three statements about anycast RP are true? (Choose three.)
A. MSDP is running between anycast RPs.
B. Anycast RP provides redundancy and load-sharing capabilities
C. Multicast BGP is running between anycast RPs.
D. In anycast RP, two or more RPs are configured with the same multicast IP address on loopback interfaces
E. In anycast RP, two or more RPs are configured with the same unicast IP address on loopback interfaces
Correct Answer: ABE
QUESTION 111
Which are correct descriptions and configurations of Anycast RP? (Choose three).
A. In Anycast RP, two or more RPs are configured with the same IP address on loopback interfaces.
B. Anycast RP provides redundancy and load-sharing capabilities.
C. Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip pim rpaddress 1.1.1.1
D. Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip rp-address pim 1.1.1.1
E. Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip anycast-rp pim 1.1.1.1
Correct Answer: ABC
QUESTION 112
What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations?
A. immediately after receiving the first packet on the shared tree for a given (S, G)
B. after receiving over 1 kb/s traffic on the shared tree for a given (S, G)
C. 10 seconds after receiving the first packet on the shared tree for a given (S, G)
D. 30 seconds after receiving the first packet on the shared tree for a given (S, G)
E. after receiving over 10 kb/s traffic on the shared tree for a given (S, G)
Correct Answer: A
QUESTION 113
Cisco IOS XR Software Multicast Routing Implementation, which three features are supported in IPv6 on Cisco CRS router? (Choose three.)
A. PIM-SSM
B. Aggregation multicast
C. PIM-Bidirectional
D. OOR handling
E. Integrated multicast
F. Multicast NSF
Correct Answer: ACF
QUESTION 114
Which of the following statements is correct regarding PIM Sparse Mode operations?
A. Receivers are "registered" with RP by their first-hop router
B. It supports shared trees only assuming all hosts want the multicast traffic
C. From the RP, traffic flows down a Source Tree to each receiver
D. It does not support all underlying unicast routing protocols like BGP
E. Receivers are "joined" to the Shared Tree (rooted the rp) by their local Designated Router (DR)
Correct Answer: E
QUESTION 115
Which two statements about RPF checks in Multicast Source Discovery Protocol (MSDP) are true? (Choose two)
A. RPF check should be done against the route to the source of the corresponding PIM-SM domain.
B. Checking session advertisement (SA) messages causes messages looping.
C. The RPF check ensures that there is a working redundancy for anycast RPs.
D. RPF check should be done against the route to the RP of the PIM-SM domain that originated the SA.
E. It prevents message looping, and session advertisement (SA) messages must be RPF checked.
Correct Answer: DE
QUESTION 116
What type of IPv6 address is this address FF05::2:260:8FF:FE52:F9D8?
A. multicast temporary node local
B. multicast temporary site local
C. unicast permanent link local
D. multicast permanent node link local
E. multicast permanent site local
F. unicast temporary link local
Correct Answer: E
QUESTION 117
In PIM-SM operations, the first router connected to the multicast source sends the Register message to which device?
A. Designated Router (DR)
B. Multicast source
C. Multicast receiver
D. RP mapping agent
E. RP
Correct Answer: E
QUESTION 118
Which three statements about bidirectional PIM are true? (Choose three)
A. Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes multiple paths in a redundant network topology.
B. It does not require any traffic signaling in the protocol
C. Membership to a bidirectional group is signaled using explicit Join messages.
D. It maintains source-specific forwarding state.
E. It reduces memory, bandwidth, and CPU requirements
Correct Answer: BCE
QUESTION 119
Which of the following technologies can improve convergence time following a link failure in a service provider network? (Choose two.)
A. RSVP
B. MPLS TE FR
C. MPLS VPN
D. SNMP
E. BFD
F. VPLS
Correct Answer: BE
QUESTION 120
You are about to design a very fast convergence time on a SP network. Which feature would you utilize to declare a link failure within less than two seconds of the
fault on a link?
A. fast convergence SFP
B. MTU discovery
C. redundancy links
D. keepalive
E. carrier delay
Correct Answer: E
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