400-101 CCIE Routing and Switching Written Practice Exam Set 1

RouterA and RouterB are connected by their Serial 0/0 interfaces. You are able to successfully ping from one router to the other? however, the routers are not establishing an OSPF neighbor relationship. You issue the debug ip ospf hello command on each router and notice that RouterA is sending hello packets but not receiving them. Which of the following statements best describes why the routers are unable to form a neighbor relationship? (Select the best answer.)


Options are :

  • The Serial 0/0 interface of RouterB is configured as a passive interface. (Correct)
  • The Serial 0/0 interface of RouterA is configured as a passive interface.
  • RouterA should be configured as the DR.
  • RouterB should be configured as the DR.

Answer : The Serial 0/0 interface of RouterB is configured as a passive interface.

400-101 CCIE Routing and Switching Written Practice Exam Set 8

You issue the following commands on RouterA: RouterA(config)#policy-map boson RouterA(config-pmap)#class applications RouterA(config-pmap-c)#police 100000 5000 8000 conform-action transmit exceed-action set-qos-transmit 4 violate-action drop When will RouterA begin to drop packets? (Select the best answer.)


Options are :

  • when the burst rate exceeds 8,000 bits
  • when the burst rate exceeds 5,000 bits
  • .when the burst rate exceeds 40,000 bits
  • when the burst rate exceeds 64,000 bits (Correct)

Answer : when the burst rate exceeds 64,000 bits

Which of the following statements are true when an RSTP switch detects a topology change? (Select 2 choices.)


Options are :

  • .It flushes the MAC addresses associated with its non-edge designated ports and its root port from the CAM table. (Correct)
  • It starts the TC While timer with a value equal to three times the hello timer for all its nonedge designated ports and its root port.
  • It starts the TC While timer with a value equal to twice the hello timer for all its non-edge designated ports and its root port. (Correct)
  • It flushes the MAC addresses associated with its edge designated ports and its root port from the CAM table.
  • It starts the TC While timer with a value equal to the hello timer for all its non-edge designated ports and its root port.

Answer : .It flushes the MAC addresses associated with its non-edge designated ports and its root port from the CAM table. It starts the TC While timer with a value equal to twice the hello timer for all its non-edge designated ports and its root port.

Which of the following OSPF LSAs are also called ASBR summary LSAs? (Select the best answer.)


Options are :

  • Type 2 LSAs
  • Type 3 LSAs
  • Type 4 LSAsE (Correct)
  • .Type 1 LSAs

Answer : Type 4 LSAsE

400-101 CCIE Routing and Switching Written Practice Exam Set 2

Which of the following commands can you issue to limit EIGRP queries? (Select 2 choices.) eigrp stub


Options are :

  • .ip summary-address eigrp as-number address mask
  • router eigrp as-number (Correct)
  • ip hold-time eigrp as-number seconds
  • ip hello-interval eigrp as-number seconds (Correct)

Answer : router eigrp as-number ip hello-interval eigrp as-number seconds

Which of the following ICMPv6 message types is sent by an IPv6capable host at startup? (Select the best answer.)


Options are :

  • router solicitation (Correct)
  • neighbor solicitation
  • .router advertisement
  • neighbor advertisement

Answer : router solicitation

RouterA receives routes to the following overlapping networks: 192.168.1.0/24 192.168.1.0/25 192.168.1.0/26 192.168.1.0/28 Each of the routes is received from a different routing protocol. Which of the following routes will RouterA install in the routing table? (Select the best answer.)


Options are :

  • all of the routes (Correct)
  • .the route with the shortest prefix match
  • the route with the lowest AD
  • .the route with the highest AD

Answer : all of the routes

400-101 CCIE Routing and Switching Written Practice Exam Set 3

What do dual stacks enable a host to do? (Select the best answer.)


Options are :

  • Dual stacks enable an IPv4only host to communicate with an IPv6only host.
  • Dual stacks enable a host to pass IPv4 traffic over an IPv6only network.
  • Dual stacks enable a host to pass IPv4 and IPv6 traffic (Correct)
  • Dual stacks enable a host to pass IPv6 traffic over an IPv4only network.
  • Dual stacks enable an IPv6only host to communicate with an IPv4only host.

Answer : Dual stacks enable a host to pass IPv4 and IPv6 traffic

At which security level does SNMPv3 use CBCDES to encrypt authentication? (Select the best answer.)


Options are :

  • at the noAuthNoPriv security level
  • at none of the security levels
  • .at the authNoPriv security level
  • at the authPriv security level (Correct)

Answer : at the authPriv security level

Which of the following statements are true regarding OSPFv3? (Select 3 choices.)


Options are :

  • The BDR is elected before the DR is elected. (Correct)
  • OSPFv3 supports multiple instances on a single link. (Correct)
  • .Enabling OSPFv3 on an interface enables the OSPFv3 routing process on the router. (Correct)
  • OSPFv3 does not support IPv6.

Answer : The BDR is elected before the DR is elected. OSPFv3 supports multiple instances on a single link. .Enabling OSPFv3 on an interface enables the OSPFv3 routing process on the router.

400-101 CCIE Routing and Switching Written Practice Exam Set 6

For which of the following routes does PfR use PIRO? (Select 2 choices.)


Options are :

  • .BGP
  • EIGRP
  • .IS-IS (Correct)
  • OSPF (Correct)

Answer : .IS-IS OSPF

Which of the following statements best describes split horizon? (Select the best answer.)


Options are :

  • Split horizon prevents routers from advertising a route through the same interface from which the route was learned. (Correct)
  • .Split horizon prevents switching loops.
  • Split horizon prevents routing loops by advertising a route as unreachable to all devices.
  • .Split horizon prevents routing loops by advertising a route as unreachable to the interface from which the route was received.

Answer : Split horizon prevents routers from advertising a route through the same interface from which the route was learned.

Which of the following terms refers to a congestion avoidance mechanism? (Select the best answer.)


Options are :

  • tail drop (Correct)
  • queuing
  • .global synchronization
  • TCP starvation

Answer : tail drop

400-101 CCIE Routing and Switching Written Practice Exam Set 7

In which of the following situations are redistributed routes not entered into the routing table by default? (Select 2 choices.)


Options are :

  • when RIP routes are redistributed into OSPF
  • when BGP routes are redistributed into OSPF
  • when EIGRP routes are redistributed into RIP (Correct)
  • when EIGRP routes are redistributed into BGP
  • when OSPF routes are redistributed into EIGRP (Correct)

Answer : when EIGRP routes are redistributed into RIP when OSPF routes are redistributed into EIGRP

You issue the following commands on a Cisco router named RouterA: RouterA(config)#ip options ignore RouterA(config)#ip options drop Which of the following statements are true? (Select 2 choices.)


Options are :

  • RouterA will ignore IP options on packets. (Correct)
  • RouterA will remove IP options on packets.
  • RouterA will drop all packets with IP options.
  • RSVP and IGMPv2 might not function properly (Correct)

Answer : RouterA will ignore IP options on packets. RSVP and IGMPv2 might not function properly

What does an asterisk indicate in the output of the show ip pim tunnel command? (Select the best answer.)


Options are :

  • The entry includes all multicast sources.
  • Fast switching is enabled.
  • The neighbor has been learned through an assert.
  • The router is an RP. (Correct)

Answer : The router is an RP.

400-101 CCIE Routing and Switching Written Practice Exam Set 9

Which of the following NetFlow features is not unique to version 9 and later? (Select the best answer.)


Options are :

  • support for IPv6 flows
  • .support for MPLS flows
  • support for multicast flows
  • support for router-based aggregation (Correct)
  • .template-based export protocol

Answer : support for router-based aggregation

Your company has configured STP with the timers set to their default values. For what duration will the TC bit be set by the root bridge after it receives a TCN BPDU? (Select the best answer.)


Options are :

  • two seconds
  • 15 seconds
  • 20 seconds
  • 35 seconds (Correct)

Answer : 35 seconds

Which of the following statements is correct regarding EIGRPv6? (Select the best answer.)


Options are :

  • .The auto-summary command enables automatic summarization for EIGRPv6.
  • The ipv6 router eigrp asnumber command enables EIGRPv6 on all router interfaces, including passive interfaces and loopback interfaces.
  • .The no shutdown command enables the EIGRPv6 routing process. (Correct)
  • The network command configures the networks that should be advertised by EIGRPv6.
  • .The distribute-list route-map command enables route filtering for EIGRPv6.

Answer : .The no shutdown command enables the EIGRPv6 routing process.

400-101 CCIE Routing and Switching Written Practice Exam Set 9

Which of the following statements is correct regarding the differences between PIM snooping and IGMP snooping? (Select the best answer.)


Options are :

  • PIM snooping restricts multicast traffic on interfaces that are connected to multicast routers; IGMP snooping does not. (Correct)
  • IGMP snooping is disabled by default? PIM snooping is enabled by default.
  • PIM snooping restricts IPv6 multicast traffic? IGMP snooping does not.
  • IGMP snooping requires that PIM snooping also be enabled; PIM snooping does not require that IGMP snooping also be enabled.

Answer : PIM snooping restricts multicast traffic on interfaces that are connected to multicast routers; IGMP snooping does not.

Which of the following routes cannot be redistributed into a dynamic routing protocol? (Select 2 choices.)


Options are :

  • .L 2001:1234::1/128 [0/0] (Correct)
  • C 2001:1234::/64 [0/0]
  • .L 192.168.1.1/32 is directly connected, Ethernet0/0 (Correct)
  • C 192.168.1.1/32 is directly connected, Loopback0
  • .C 192.168.1.0/30 is directly connected, Ethernet0/0

Answer : .L 2001:1234::1/128 [0/0] .L 192.168.1.1/32 is directly connected, Ethernet0/0

Which of the following is used to encrypt data between GET VPN group members? (Select the best answer.)


Options are :

  • .KEK
  • TSK
  • .TEK (Correct)
  • .SAR

Answer : .TEK

400-101 CCIE Routing and Switching Written Practice Exam Set 5

Which of the following steps in the NAT order of operation typically occur after NAT outside-to-inside translation? (Select 4 choices.)


Options are :

  • encryption (Correct)
  • inspect CBAC (Correct)
  • check outbound access list (Correct)
  • .IP routing (Correct)
  • check inbound access list
  • .redirect to web cache

Answer : encryption inspect CBAC check outbound access list .IP routing

You boot a router that contains an RXBOOT image and no startup configuration file. After a few moments, streamlined Setup mode begins. Which of the following will you be prompted to configure? (Select the best answer.)


Options are :

  • the host name
  • interface parameters (Correct)
  • the VTY password
  • the enable secret password

Answer : interface parameters

Which of the following attacks can be mitigated by implementing uRPF? (Select the best answer.)


Options are :

  • man-in-the-middle attacks
  • malware attacks
  • IP spoofing attacks (Correct)
  • reconnaissance attacks

Answer : IP spoofing attacks

400-101 CCIE Routing and Switching Written Practice Exam Set 9

Which of the following messages are sent using multicast addresses 224.0.1.39 and 224.0.1.40? (Select the best answer.)


Options are :

  • PIMv1 messages
  • PIMv2 messages
  • Auto-RP messages (Correct)
  • BSR messages

Answer : Auto-RP messages

Which of the following can be applied on a switch to filter inbound traffic on nonrouted ports? (Select the best answer.)


Options are :

  • .both VACLs and RACLs
  • .PACLs
  • RACLs
  • VACLs
  • both VACLs and PACLs (Correct)

Answer : both VACLs and PACLs

.It flushes the MAC addresses associated with its non-edge designated ports and its root port from the CAM table.


Options are :

  • Router(config)#event manager applet boson Router(configapplet)#event cli pattern "show runningconfig" sync yes Router(configapplet)#action 1.0 syslog msg "Running configuration displayed" Router(configapplet)#set 2.0 _exit_status 1 (Correct)
  • Router(config)#event manager applet boson Router(configapplet)#event cli pattern "show runningconfig" sync yes Router(configapplet)#action 1.0 syslog msg "Running configuration displayed" Router(configapplet)#set 2.0 _exit_status 0
  • Router(config)#event manager applet boson Router(configapplet)#event cli pattern "show runningconfig" sync no skip yes Router(configapplet)#action 1.0 syslog msg "Running configuration displayed"
  • Router(config)#event manager applet boson Router(configapplet)#event cli pattern "show runningconfig" sync no skip no Router(configapplet)#action 1.0 syslog msg "Running configuration displayed"

Answer : Router(config)#event manager applet boson Router(configapplet)#event cli pattern "show runningconfig" sync yes Router(configapplet)#action 1.0 syslog msg "Running configuration displayed" Router(configapplet)#set 2.0 _exit_status 1

400-101 CCIE Routing and Switching Written Practice Exam Set 9

Which of the following terms best describe the origin, ASpath, and next hop BGP attributes? (Select 2 choices.)


Options are :

  • well-known (Correct)
  • nontransitive
  • discretionary
  • .transitive
  • optional
  • mandatory (Correct)

Answer : well-known mandatory

Which of the following commands is functionally equivalent to the no mls qos map cosdscp command, thereby setting the CoStoDSCP map to the default settings? (Select the best answer.)


Options are :

  • mls qos map cosdscp 4 8 12 16 20 24 28 32
  • mls qos map cosdscp 8 16 24 32 40 48 56 64
  • .mls qos map cosdscp 0 8 16 24 32 40 48 56 (Correct)
  • mls qos map cosdscp 0 4 8 12 16 20 24 28

Answer : .mls qos map cosdscp 0 8 16 24 32 40 48 56

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