Cisco 400-101 CCIE Routing and Switching Written Exam Online Training
Cisco 400-101 Online Training
The questions for 400-101 were last updated at Sep 14,2025.
- Exam Code: 400-101
- Exam Name: CCIE Routing and Switching Written Exam
- Certification Provider: Cisco
- Latest update: Sep 14,2025
An IPv6 network has different MTUs on different segments. If the network is experiencing reliability issues, which option is the most likely reason?
- A . The MTU size is greater than 1470 bytes.
- B . The Do Not Fragment bit is marked.
- C . ICMPv6 is filtered.
- D . HSRPv6 is configured incorrectly.
Refer to the exhibit.
Which two actions can you take to allow the network 1 72.29.224.0/24 to be reachable from peer 192.168.250.53? (Choose two)
- A . Modify the outbound route map to permit all additional traffic.
- B . Configure soft reconfiguration to peering 192.168.250.53
- C . Modify the community list to match community 64513:64090 attached to 172.29.224.0/24.
- D . Configure additional address families to peering 192.168.250.53
- E . Modify the inbound route map to permit all additional traffic
In an MPLS-VPN environment, what is the effect of configuring an identical set of route targets for a particular VRF but then configuring nonidentical RD accross multiple PE devices?
- A . The routes are rejected by remote PE because they have a different RD than its routes.
- B . The routes propagate to the remore PE, but the PE never installs them in its forwarding table.
- C . The routes are correctly managed by the control plane, but there are instances where routes take up twice as much memory.
- D . The routes are not sent to any remote PE with a differnt RD.
Drag and drop the OSPFv3 LSA type on the left to the functionality it provides on the right.
Which three components are in an MPLS header? (Choose three)
- A . a 4-bit experimental use field
- B . a 4-bit label stack entry
- C . an 8-bit TTL
- D . a 2-bottom of stack
- E . a 3-bit experimental use field
- F . a 20-bit label
Which two statement are true about IS-IS (choose Two.)
- A . IS-IS DIS election is nondeterministic.
- B . IS-IS work over the data link layer, which does not provide for Fragmentation and reassembly.
- C . IS-IS can never be routed beyond the immediate next hop.
- D . IS-IS SPF calculation is performed in three phases
Which three NETCONF data stores are valid? (Choose three)
- A . Capabilities
- B . Notification
- C . Running
- D . State
- E . Startup
- F . Candidate
Refer to the exhibit.
Which two effects will this gitignore file have on Git operations? (Choose two)
- A . Ignore the env file
- B . Ignore Python compiled files
- C . Ignore the env directory
- D . Ignore Python source code files
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