The Secret of 400-101 exam fees

Exam Code: 400-101 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: CCIE Routing and Switching (v5.0)
Certification Provider: Cisco
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2021 Apr 400-101 exam answers

Q91. Which three fields are part of a TCN BPDU? (Choose three.) 

A. protocol ID 

B. version 

C. type 

D. max-age 

E. flags 

F. message age 

Answer: A,B,C 


Q92. Which three statements about EIGRP wide metrics are true? (Choose three.) 

A. The maximum metric is 65536. 

B. The default delay is 1,000,000 picoseconds. 

C. They allow up to 100 hops. 

D. They allow up to 256 hops. 

E. The default delay is 1,000,000 milliseconds. 

F. The maximum metric is 51200. 

Answer: A,B,C 


Q93. What is the new designation for the MPLS EXP (experimental) bits? 

A. QoS bits 

B. traffic class bits 

C. flow bits 

D. precedence bits 

Answer:

Explanation: 

To avoid misunderstanding about how this field may be used, it has become increasingly necessary to rename this field. This document changes the name of the EXP field to the "Traffic Class field" ("TC field"). In doing so, it also updates documents that define the current use of the EXP field. 

Reference: https://tools.ietf.org/html/rfc5462 


Q94. Which map is locally defined? 

A. DSCP-to-DSCP-mutation 

B. CoS-to-DSCP 

C. IP-precedence-to-DSCP 

D. DSCP-to-CoS 

Answer:


Q95. Which statement about SSHv2 is true? 

A. Routers acting as SSH clients can operate without RSA keys. 

B. SSHv2 supports port forwarding and compression. 

C. The RSA key pair size must be at least 512. 

D. You must configure a default gateway before you enable SSHv2. 

Answer:


Refresh 400-101 exam question:

Q96. How many hash buckets does Cisco Express Forwarding use for load balancing? 

A. 8 

B. 16 

C. 24 

D. 32 

Answer:

Explanation: 

In order to understand how the load balance takes place, you must first see how the tables relate. The Cisco Express Forwarding table points to 16 hash buckets (load share table), which point to the adjacency table for parallel paths. Each packet to be switched is broken up into the source and destination address pair and checked against the loadshare table. 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/express-forwarding-cef/18285-loadbal-cef.html 


Q97. Refer to the exhibit. 

Assume that Cisco Discovery Protocol is supported and enabled only on switches A and C. 

Which information is returned when you issue the command show cdp neighbors on switch C? 

A. a limited amount of information about switch B 

B. neighbor details for switch A 

C. neighbor details for switch B 

D. neighbor details for switch C 

Answer:


Q98. In IPv6 Path MTU Discovery, which ICMP message is sent by an intermediary router that requires a smaller MTU? 

A. Time Exceeded, with code 1 (fragment reassembly time exceeded) 

B. Packet Too Big 

C. Destination Unreachable, with code 4 (the datagram is too big) 

D. Multicast Termination Router 

Answer:


Q99. Which two modes of operation does BFD support? (Choose two.) 

A. synchronous mode 

B. asynchronous mode 

C. demand mode 

D. echo mode 

E. aggressive mode 

F. passive mode 

Answer: B,C 

Explanation: 

A session may operate in one of two modes: asynchronous mode and demand mode. In 

asynchronous mode, both endpoints periodically send Hello packets to each other. If a number of those packets are not received, the session is considered down. In demand mode, no Hello packets are exchanged after the session is established; it is assumed that the endpoints have another way to verify connectivity to each other, perhaps on the underlying physical layer. However, either host may still send Hello packets if needed. 

Reference: http://en.wikipedia.org/wiki/Bidirectional_Forwarding_Detection 


Q100. Refer to the exhibit. 

You must complete the configuration on R1 so that a maximum of three links can be used and fragmentation is supported. 

Which additional configuration accomplishes this task? 

A. interface Multilink19 

ip address 192.168.1.1 255.255.255.0 

ppp multilink 

ppp multilink group 19 

ppp multilink links minimum 1 

ppp multilink links maximum 3 

ppp multilink interleave 

B. interface Multilink19 

ip address 192.168.1.1 255.255.255.0 

ppp multilink 

ppp multilink group 19 

ppp multilink links maximum 3 

ppp multilink fragment delay 20 

C. interface Multilink19 

ip address 192.168.1.1 255.255.255.0 

ppp multilink 

ppp multilink group 19 

ppp multilink links maximum 3 

ppp multilink fragment delay 20 

ppp multilink interleave 

D. interface Multilink19 

ip address 192.168.1.1 255.255.255.252 

ppp multilink 

ppp multilink group 19 

ppp multilink links maximum 3 

ppp multilink interleave 

Answer:

Explanation: 

The “ppp multilink interleave” command is needed to enable link fragmentation and Interleaving (LFI). The Cisco IOS Link Fragmentation and Interleaving (LFI) feature uses Multilink PPP (MLP). MLP provides a method of splitting, recombining, and sequencing datagrams across multiple logical data links. MLP allows packets to be fragmented and the fragments to be sent at the same time over multiple point-to-point links to the same remote address. 

ppp multilink links maximum 

To limit the maximum number of links that Multilink PPP (MLP) can dial for dynamic allocation, use the ppp multilink links maximum command in interface configuration mode. 

Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/qos/configuration/guide/fqos_c/qcflfi.html