Cisco 400-101 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 400-101
Exam Name/Title: CCIE Routing and Switching Written Exam
Certification Provider: Cisco
Corresponding Certification: CCIE

Exam Questions: 150
Updated On: Jul 02, 2026

Question #9

Which IPv6 tunneling mechanism requires a service provider to use one of its own native IPv6 blocks to guarantee that its IPv6 hosts will be reachable?

A. 6rd tunneling

B. automatic 6to4 tunneling

C. ISATAP tunneling

D. NAT-PT tunneling

E. automatic 4to6 tunneling

F. manual ipv6ip tunneling

Discussion 0

Correct Answer: A Vote an answer

Question #10

Which two statements about BGP confederation architecture are true? (Choose two.)

A. The intraconfederation EBGP default TTL value between sub-ASes is 1.

B. The intraconfederation EBGP default TTL value between sub-ASes is 255.

C. The AS_SET and AS_SEQ components help prevent loops inside a sub-AS.

D. The ASN of a confederation is exclueded from the AS_PATH path length calculation.

E. IBGP sessions inside a sub-AS have a default TTL of 1.

Discussion 0

Correct Answer: A,D Vote an answer

Question #11

Which two statements about redistribution are true? (Choose two.)

A. When EIGRP traffic is redistributed into BGP, a default metric is required.

B. When BGP traffic is redistributed into OSPF, eBGP and iBGP routes are advertised.

C. When BGP traffic is redistributed into OSPF, the metric is set to 1 unless the metric is defined.

D. iBGP routes automatically redistribute into the IGP if the routes are in the routing table.

E. When OSPF traffic is redistributed into BGP, internal and external routes are redistributed.

F. When EIGRP routes on a CE are redistributed through a PE into BGP, the Cost Community POI is set automatically.

Discussion 0

Correct Answer: C,F Vote an answer

Question #12

What are two conditions that can cause UDLD to move an interface into the errdisable state? (Choose two.)

A. UDLD detects a mismatch between timer settings on neighboring switches.

B. A port in normal UDLD mode fails to receive a UDLD message for a prolonged time period.

C. An ACL denying all IP traffic is applied to a switchport.

D. A switch receives its own UDLD message on the same port it has sent it from.

E. The list of detected neighbors in a received UDLD message is missing the receiving switch ID and port ID combination.

Discussion 0

Correct Answer: C,E Vote an answer

Question #13

Which two statements about 802.1 x authentications with EAP are true? (Choose two)

A. It uses EAPOL frames between the supplicant and the authenticator

B. The interface passes only EAPOL traffic until the client is authenticated

C. The authenticator can cache the username and password from the authentication server to reduce traffic

D. The authenticator server translates frames from the supplicant into a RADIUS message

E. The supplicant and authenticator server send a one-time password to the authenticator

Discussion 0

Correct Answer: A,B Vote an answer

Question #14

Refer to the exhibit.

Which two configurations must you apply to R2 so that it correctly translates the internal to a public IP address? (Choose two.)

A. Option B

B. Option D

C. Option C

D. Option E

E. Option A

Discussion 0

Correct Answer: B,E Vote an answer

Question #15

Which two statements about SNMP are true? (Choose two.)

A. The SNMP agent is responsible for collecting data from the MIB.

B. SNMPv2c supports only 32-bit counters.

C. SNMPv2c can provide authentication as well as encryption.

D. The SMNP manager is responsible for collecting data from the MIB.

E. SNMPv3 uses the SHA encryption algorithm to provide authorization.

F. SNMPv3 uses the 3DES encryption algorithm to provide data privacy.

Discussion 0

Correct Answer: A,F Vote an answer

Question #16

Which feature can mitigate hung management sessions?

A. vty line ACLs

B. the service tcp-keepalives-in and service tcp-keepalives-out command

C. the service tcp-small servers command

D. Control Plane Policing

Discussion 0

Correct Answer: B Vote an answer

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