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
How is traffic directed to a 6RD tunnel interface from the native IPv6 Internet?
- A . Traffic is routed to the 6RD gateway of the ISP 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 nearest public gateway and encapsulated over IPv4 to the tunnel interface.
- D . Traffic is routed to the nearest public relay and encapsulated over IPv4 to the tunnel interface.
Drag and drop the NAT operations on the left into the correct sequential order on the right.
You are backing up a server with a 1 Gbps link and a latency of 2 ms.
Which two statements about the backup are true? (Choose two.)
- A . The bandwidth delay product is 2 Mb.
- B . The default TCP send window size is the limiting factor.
- C . The default TCP receive window size is the limiting factor.
- D . The bandwidth delay product is 500 Mb.
- E . The bandwidth delay product is 50 Mb.
Which PIM multicast type is designed to be used for many-to-many applications within individual PIM domains?
- A . PIM-DM
- B . SSM
- C . PIM-SM
- D . Bidir-PIM
Refer to the exhibit.
How can you configure this network so that customers can transparently extend their networks through the provider?
- A . Configure eBGP peering among the CE routers.
- B . Configure EIGRP OTP on the CE routers.
- C . Configure eBGP peering between the CE and PE routers.
- D . Configure OSPF peering between the CE and PE routers.
Which attribute is not part of the BGP extended community when a PE creates a VPN-IPv4 route while running OSPF between PE-CE?
- A . OSPF domain identifier
- B . OSPF route type
- C . OSPF router ID
- D . MED
- E . OSPF network type
Refer to the exhibit.
Which two statements about the 192.168.23.0/24 prefix are true? (Choose two.)
- A . Router 192.168.45.4 cannot act as a feasible successor.
- B . Router 192.168.35.3 is the only successor.
- C . Only router 192.168.45.4 is a feasible successor.
- D . Routers 192.168.35.3 and 192.168.45.4 are successors.
- E . Routers 192.168.35.3 and 192.168.45.4 are feasible successors.
- F . Only router 192.168.35.3 is a feasible successor
Which two statements about BGP best-path selection are true? (Choose two.)
- A . The route with the highest local preference is preferred.
- B . The weight attribute is advertised to peers.
- C . The route with the lowest MED is preferred.
- D . A route that originates from iBGP peers is preferred.
- E . A route that originates from a router with a higher BGP router ID is preferred.
- F . The lowest weight advertised is preferred.
Which two statements about OSPFv3 are true? (Choose two.)
- A . It supports unicast address families for IPv4 and IPv6.
- B . It supports unicast address families for IPv6 only.
- C . It supports only one address family per instance.
- D . It supports the use of a cluster ID for loop prevention.
- E . It supports multicast address families for IPv4 and IPv6.
- F . It supports multicast address families for IPv6 only.
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