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 15,2025.
- Exam Code: 400-101
- Exam Name: CCIE Routing and Switching Written Exam
- Certification Provider: Cisco
- Latest update: Sep 15,2025
What is the identifying feature of an IPv6 multicast address?
- A . The hexadecimal value FFFF appears as the first four characters of the address, followed by an arbitrary value.
- B . The hexadecimal value FF appears as the first two characters of the address, followed by an arbitrary value.
- C . The binary value 1111 appears as the first four characters of the address, followed by an arbitrary value.
- D . The binary value 11 appears as the first two characters of the address, followed by an arbitrary value.
Which two statements about VXLAN are true? (Choose two)
- A . VXLAN uses the spanning Tree Protocol for loop prevention
- B . VXLAN can be used to enforce Layer 2 isolation in a multitenant infrastructure
- C . VXLAN overcomes the 802.1Q virtual LAN address space limitation
- D . VXLAN is a Cisco proprietary solution
- E . VXLAN is an encapsulation method used to create a Layer 3 overlay network
What are two characteristics of RPL, used in IoT environments? (Choose two)
- A . It is a hybrid protocol
- B . It is a distance-vector protocol
- C . It is an interior Gateway Protocol
- D . It is an Exterior Gateway Protocol
- E . It is link-state protocol
Which two improvements do SIA-Query and SIA-Reply messages add to EIGRP? (Choose two)
- A . Stuck-in-active conditions are solved faster.
- B . They prevent a route from going into the stuck-in-active state.
- C . They help in the localization of the real failure in the network.
- D . The EIGRP adjacency between two neighbors never goes down.
In the DiffServ model, which class represents the highest priority with the highest drop probability?
- A . AF11
- B . AF13
- C . AF41
- D . AF43
Refer to the exhibit.
Which option describes the purpose of the as-set argument of the aggregate-address command?
- A . it provides an AS path in the aggregate advertisement that contains only the local AS number.
- B . It provides a predefined AS path in the aggregate advertisement that is used to indicate an aggregate prefix.
- C . It provides an AS path in the aggregate advertisement that includes the AS numbers of the component members.
- D . It provides a list of AS numbers top which the aggregate is advertised.
When the BGP additional-paths feature is used, what allows a BGP speaker to differentiate between the different available paths?
- A . The remote BGP peer prepends its own next-hop address to the prefix.
- B . A unique path identifier is encoded into a dedicated field to the NLRI.
- C . A route distinguisher is appended to the prefix by the receiving BGP speaker.
- D . The additional path information is encoded in an extended community.
Drag and drop each EIGRP packet type from the left onto the matching description on the right.
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 . automatic 4to6 tunneling
- B . NAT-PT tunneling
- C . ISATAP tunneling
- D . 6rd tunneling
- E . automatic 6to4 tunneling
- F . manual ipv6ip tunneling
Refer to the exhibit.
What are two effects of the given network configuration? (Choose two.)
- A . R2 and R3 fail to form an adjacency.
- B . R2 advertises the 192.168.12.0/24 network
- C . R2 advertises the 192.168.23.0/24 network.
- D . The 192.168.12.0/24 network is added to R3 database.
- E . R1 and R2 fail to form an adjacency.
- F . The 192.168.12.0/24 network is added to R3 route table.
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