cisco 400-101 Exam Questions

Questions for the 400-101 were updated on : Dec 01 ,2025

Page 1 out of 36. Viewing questions 1-15 out of 528

Question 1

Which aspect is a significant disadvantage of containers?

  • A. Time to deploy
  • B. Reduced operational overhead
  • C. Resource consumption
  • D. Inefficiency
  • E. Security
Answer:

E

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
Discussions
vote your answer:
A
B
C
D
E
0 / 1000

Question 2

Which two statements about 6to4 tunnels are true? (Choose two.)

  • A. They allow IPv4 packets to travel over IPv6 infrastructure without modification.
  • B. They support OSPF and EIGRP traffic.
  • C. They support point-to-point traffic.
  • D. They generate an IPv6 prefix using a common IPv4 address.
  • E. They encapsulate IPv6 packets, which allows the packets to travel over IPv4 infrastructure.
  • F. They support point-to-multipoint traffic.
Answer:

E, F

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
F
50%
Discussions
vote your answer:
A
B
C
D
E
F
0 / 1000

Question 3

What is the reason to send EIGRP SIA reply to a peer?

  • A. to respond to an SIA query that the router is still waiting on replies from its peers
  • B. to respond to a query reporting that the prefix has gone stuck-in-active
  • C. to respond to a reply reporting that the prefix has gone stuck-in-active
  • D. to respond to an SIA query with the alternative path requested
Answer:

A

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 4

You have been asked to connect a remote network with different DSCP mappings to the primary
network of your organization. How can you configure the network devices so that the two networks
work together seamlessly?

  • A. Configure a mutation map on the devices on the primary network that connect to the network
  • B. Configure the mis qos trust command on the trunk ports that interconnect two networks
  • C. Configure an aggregate policer on the ingres interfaces of the trunk ports that interconnect the two networks
  • D. Configure VLAN-based Qos on all switchs on both networks
Answer:

B

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 5

Refer to the exhibit.

R2 attempted to copy a file from the TFTP server, it received this error message. Which action can
you take to correct the problem?

  • A. Configure the iptftp source-interface Fa0/1 command on R1.
  • B. Configure the iptftp source-interface Loopback0 command on R1.
  • C. Configure the iptftp source-interface Loopback0 command on R2.
  • D. Change the access-list configuration on R1 to access-list 1 permit 172.16.1.0 0.0.0.255
  • E. Configure the iptftp source-interface Fa0/1 command on R2.
Answer:

C

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
Discussions
vote your answer:
A
B
C
D
E
0 / 1000

Question 6

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

  • A. It supports split tunneling and spoke-to-spoke links.
  • B. It always prefers the least cost path
  • C. It provides intelligent route control on a per-application
  • D. It manages traffic classes.
  • E. It provides a narrower scope of route control than OER.
Answer:

C, D

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
Discussions
vote your answer:
A
B
C
D
E
0 / 1000

Question 7

Refer to the exhibit.

The PC is experiencing intermittent connectivity failures to the internet. If ADSL-R1 uses a PPPoE
connection, what action can you take to correct the problem?

  • A. Configure a system MTU of 1512 on ADSL-R1.
  • B. Configure the same OSPF process on HomeRI and HomeSI.
  • C. Configure an MTU of 1492 on the dialer interface on ADSL-R1.
  • D. Replace the dialer interface with a virtual template.
  • E. Confiqure OSPF on the connection between PC1 and HomeSI.
Answer:

C

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
Discussions
vote your answer:
A
B
C
D
E
0 / 1000

Question 8

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

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 9

Refer to the exhibit.

Which two effects of this configuration are true? (Choose two.)

  • A. It sets announcement interval to 60 seconds.
  • B. It prevents the device from falling back to dense mode.
  • C. It creates an administratively scoped boundary for ACL 60.
  • D. It configures the router as the rendezvous point.
  • E. It sets the TTL for discovery messages to 60 hops.
Answer:

D, E

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
Discussions
vote your answer:
A
B
C
D
E
0 / 1000

Question 10

Which statement describes the operation of the Generalized TTL Security Mechanism (GTSM). used
by routing protocols to prevent some types of attack?

  • A. The TTL in a received packet must be a high value (typically 254 - 255)
  • B. An MD5 hash of the received TTL, source IP, destination IP, protocol , and shared key must match
  • C. The TTL in a received packet must be a low value (typically 1 - 2)
  • D. Both end systems compute an MD5 hash based on the TTL and a shared secret. If the received and local value differ, the packet is dropped
Answer:

A

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 11

In a DMVPN solution, which component can the GRE tunnel source and destination generate
automatically?

  • A. crypto ACLs
  • B. policy maps
  • C. QoS markings
  • D. pre-shared keys
Answer:

A

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 12

When EIGRP Auto-Summary is enabled, what does Auto Summarization do in EIGRP?

  • A. Summarizes networks from different network boundaries crossing different major boundary
  • B. Summarizes all network boundaries
  • C. Summarize networks from the same network boundaries
  • D. Summarizes networks form different network boundaries crossing the same major boundary
Answer:

A

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 13

Which two statements are true about control plane policing? (Choose two.)

  • A. The log keyword can be used but the log-input keyword must not be used in policing.
  • B. Access lists that are used in policies for control plane policing must not use the log keyword
  • C. Control plane policing will affect only traffic that is destined to the route processor.
  • D. Access lists that use the deny rule in control plane policing do not progress to the next class
Answer:

B, C

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000

Question 14

What are the two requirements for BGP to install a classful network into the BGP routing table? (Ch

  • A. Synchronization is enabled.
  • B. A classful network statement with a classful mask is in the routing table.
  • C. Auto-summary is enabled.
  • D. A classful network statement with a lower administrative distance is in the routing table.
  • E. Synchronization is disabled
  • F. The AS contains the entire classful network.
Answer:

B, C

User Votes:
A
50%
B
50%
C
50%
D
50%
E
50%
F
50%
Discussions
vote your answer:
A
B
C
D
E
F
0 / 1000

Question 15

What are IPv6 address of the form FC00::/7 known as?

  • A. transition addresses for 6to4
  • B. multicast RP addresses
  • C. link-local addresses
  • D. unique local addresses
Answer:

D

User Votes:
A
50%
B
50%
C
50%
D
50%
Discussions
vote your answer:
A
B
C
D
0 / 1000
To page 2