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 #17

Drag and drop each EIGRP packet type from the left onto the matching description on the right.

Discussion 0

Correct Answer:

Question #18

Which three statements about bridge assurance are true? (Choose three.)

A. Bridge assurance is enabled on STP point-to-point links only.

B. Bridge assurance can be enabled on one end of a link or on both ends.

C. Bridge assurance must be enabled on both ends of a link.

D. If a bridge assurance port fails to receive a BPDU after a timeout, the port is put into an error disabled state.

E. Bridge assurance is enabled on STP multipoint links only.

F. If a bridge assurance port fails to receive a BPDU after a timeout, the port is put into a blocking state.

Discussion 0

Correct Answer: A,C,F Vote an answer

Question #19

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

A. An MST region is defined by its name, configuration revision, and VLAN-to-instance mapping table.

B. Each MSTI sends its own independent BPDUs.

C. BPDUs carry VLAN-to-instance mapping information to switches in the same region.

D. In an MST region, switches run a single IST and zero or more additional MSTIs.

E. An MSTI is a single PVST instance.

Discussion 0

Correct Answer: A,D Vote an answer

Question #20

What is a potential effect of combining TCP traffic and UDP traffic in a single traffic queue?

A. TCP and UDP flows would be scheduled fairly.

B. UDP starvation can occur.

C. This configuration will be rejected as invalid.

D. UDP traffic can start dominating over TCP traffic.

Discussion 0

Correct Answer: D Vote an answer

Question #21

Refer to the exhibit.

You notice that neighboring RIP IPv6 routers cannot reach OSPFv3 routes on R1.
Which reason for the problem is most likely true?

A. The IPv6 process is missing an IPv6 RIP default metric.

B. The redistribution command under the OSPF process is missing.

C. The IPv6 RIP process is missing a redistribution route map.

D. The redistribution metric is too large.

Discussion 0

Correct Answer: D Vote an answer

Question #22

When the BGP additional-paths feature is used, what allows a BGP speaker to differentiate between the different available paths?

A. The additional path information is encoded in an extended community.

B. A route distinguisher is appended to the prefix by the receiving BGP speaker.

C. The remote BGP peer prepends its own next-hop address to the prefix.

D. A unique path identifier is encoded into a dedicated field to the NLRI.

Discussion 0

Correct Answer: D Vote an answer

Question #23

Refer to the exhibit.

If R4 is configured as shown, which EIGRP routers are present in the R1 routing table?

A. 4.4.4.4/32 and 10.2.4.0/24 only

B. 4.4.4/32 and 10.1.4.0/24 only

C. 0.0.0.0/0 and 4.4.4.4/32 only

D. 4.4.4/32 ,10.2.4.0/24 and 2.2.2.2/32

E. 0.0.0.0/0,4.4.4.4/32, and 10.2.4.0/24

Discussion 0

Correct Answer: A Vote an answer

Question #24

How is traffic directed to a 6RD tunnel interface from the native IPv6 Internet?

A. Traffic is routed to the nearest public relay and encapsulated over IPv4 to the tunnel interface.

B. Traffic is sent encapsulated in IPv4 from the native IPv6 host directly to the tunnel interface.

C. Traffic is routed to the 6RD gateway of the ISP and encapsulated over IPv4 to the tunnel interface.

D. Traffic is routed to the nearest public gateway and encapsulated over IPv4 to the tunnel interface.

Discussion 0

Correct Answer: D Vote an answer

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