400-101 Actual Exam

By Author: Dennis Ng
Total Articles: 67
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Question: 1

What are two of the commands that you can enter to gracefully shut down OSPF and notify neighbors?(Choose two)

A. router(config-if)# ip ospf graceful shutdown
B. router(config-if)# ip ospf shutdown
C. router(config-router)# shutdown
D. router(config-router)# graceful shutdown
E. router(config)# ip notify

Answer: BC

Question: 2

A packet from network 10.0.1.0/24 destined for network 10.0.2.0/24 arrives at Rl on interface GiO/0, but the router drops the packet instead of transmitting it out interface Gi0/1.

Which feature that is configured on R1 can cause this problem?

A. UDLC
B. split horizon
C. uRPF
D. spanning tree

Answer: C

Question: 3

Which three service offer VLAN transparency for WAN Ethernet services? (Choose three)

A. ERMS
B. EPL
C. ERS
D. MPLS
E. EMS
F. EWS

Answer: BEF

Question: 4

What are two mechanisms that directed ARP uses ...
... to help resolve IP addresses to hardware addresses? (Choose two)

A. It removes address-resolution restrictions, allowing dynamic protocols to advertise rou information for the device loopback address.
B. It uses ICMP redirects to advertise next-hop addresses to foreign hosts
C. It uses series of ICMP echo messages to relay next-hop addresses.
D. It removes address-resolution restrictions, allowing dynamic protocols to advertise routing information for the next-hop address.
E. t uses a proxy mechanism to allow a device to respond to ARP requests for the addresses of other devices

Answer: BD

Question: 5

Exhibit:

Your network is suffering excessive output drops. Which two actions can you take to resolve the problem? (Choose two.)

A. Install a switch with larger buffers.
B. Configure a different queue set.
C. Reconfigure the switch buffers.
D. Configure the server application to use TCP.
E. Update the server operating system.

Answer: A B


Question: 6

Which two statements about DMVPN with NHRP are true? (Choose two)

A. NHRP shortens the configuration of the hub router.
B. NHRP dynamically provides information about the spoke routers to the hub.
C. NHRP disables multicast
D. The hub router uses NHRP to initiate the GRE tunnel with spokes.
E. The spoke routers act as the NHRP servers.

Answer: AB

Question: 7

Which two statements about private VLAN communications are true? (Choose two)

A. Primary VLAN traffic is passed across trunk interfaces.
B. Isolated ports communicate with other isolated ports.
C. Promiscuous ports communicate with all other ports.
D. Promiscuous ports connect only to routers.

Answer: AC

Question: 8

Which command can you use to redistribute IBGP routes into the IGP?

A. no synchronization
B. redistribute protocol process-number
C. bgp redistribute-internal
D. synchronization

Answer: C

Question: 9

Which two statements about VPLS are true? (Choose two)

A. The service provider provisions CE devices.
B. It transmits broadcast traffic more efficiently than Ethernet switches.
C. It uses broadcast replication to transmit Ethernet packets with multicast MAC addresses.
D. It enables CE devices to operate as part of an L3 VPN.
E. It enables CE devices on different networks to operate as if they were in the same LAN.
F. It enables PE and CE devices to operate as if they were routing neighbors.

Answer: CE

Question: 10

Which two services are used to transport Layer 2 frames across a packet-switched network? (Choose two.)

A. Frame Relay
B. ATM
C. AToM
D. L2TPv3

Answer: CD

Question: 11

Exhibit:

Which option describes the meaning of this console message?

A. An EIGRP hold timer has expired.
B. FastEthernetO/O has interface errors.
C. An EIGRP process has been shut down.
D. An interface has gone down.

Answer: C

Question: 12

Which two statements about Cisco Express Forwarding are true? (Choose two)

A. The FIB table and the adjacency table reside on the line cards when distributed Cisco Express Forwarding is enabled.
B. Layer 2 next-hop address information is maintained in the adjacency table.
C. The FIB table and the adjacency table reside on the line cards when Cisco Express Forwarding is enabled.
D. Layer 2 next-hop address information is maintained in the FIB table.
E. The FIB table resides on the route processor and the adjacency table resides on the line cards when Cisco Express Forwarding is enabled.

Answer: AB

Question: 13

When is it useful to disable split horizon on an EIGRP interface?

A. Disable it when you want to provide additional backup paths in your network.
B. Disable it when you want to send routes that are learned from another routing protocol to peer on the same interface.
C. Disable it when you need to send updates to peers on the interface on which the updates were received.
D. It is never advisable to disable split horizon on an EIGRP interface.

Answer: C

Question: 14

Which two statements about RIPng are true? (Choose two)

A. IPv6 can support as many as 8 equal-cost routes.
B. IPv6 can support as many as 32 equal-cost routes.
C. A route with a metric of 15 is advertised as unreachable.
D. Both inbound and outbound route filtering can be implemented on a single interface.
E. 16 is the maximum metric it can advertise.

Answer: DE

Question: 15

Which two statements about TCP MSS are true? (Choose two.)

A. The two endpoints in a TCP connection report their MSS values to one another.
B. It operates at Layer 3.
C. MSS values are sent in TCP SYN packets
D. It sets the maximum amount of data that a host sends in an individual datagram
E. It sets the minimum amount of data that a host accepts in an individual datagram

Answer: CD

Question: 16

which three statements about automatic 6to4 tunneling are true?(choose three)

A. It allows an IPV6 domain to be connected over an IPV4 network
B. 6to4 tunnels are configured only in a point-point configuration
C. It allows an IPV4 domain to be connected over an IPV6 network
D. The IPV4 address embedded into the IPV6 address is used to find other of the tunnel
E. The MAC address embedded into the IPV6 address is used to find the other end of the tunnel
F. 6to4 tunnels are configured in a point-to-mulitipoint configuration

Answer: ADF

Question: 17

Which two statements about OSPF route filtering are true? (Choose two)

A. It can be based on the source router ID.
B. It can be based on the external route tag.
C. It affects LSA flooding.
D. It can be based on the as-path.
E. It can be based on distance-

Answer: AB

Question: 18

Which three parameters must match to establish OSPF neighbor adjacency? (Choose three.)

A. the process ID
B. the hello interval
C. the subnet mask
D. authentication
E. the router ID
F. the OSPF interface priority

Answer: BCD

Question: 19

Which statement is true about LLDP?

A. LLDP provides VTP support.
B. LLDP does not use a multicast address to communicate.
C. LLDP can indicate only the duplex setting of a link, and not the speed capabilities.
D. LLDP does not support native VLAN indication.

Answer: D

Question: 20


The OSPF adjacency between two routers cannot be established. What is the root cause of the problem?

A. Both routers are designated routers.
B. different area ID
C. mismatched OSPF network types
D. authentication error
E. area type mismatch

Answer: E

Question: 21

What are two of the commands that you can enter to gracefully shut down OSPF and notify neighbors?(Choose two)

A. router(config-if)# ip ospf graceful shutdown
B. router(config-if)# ip ospf shutdown
C. router(config-router)# shutdown
D. router(config-router)# graceful shutdown
E. router(config)# ip notify

Answer: BC