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2021 Nov ccie pdf download:

Q141. 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. 

Answer: A,C 


Q142. Which two statements about static NAT are true? (Choose two.) 

A. An outside local address maps to the same outside global IP address. 

B. An inside local address maps to a different inside global IP address. 

C. An outside local address maps to a different outside global IP address. 

D. An inside local address maps to the same inside global IP address. 

Answer: A,D 

Explanation: 

Example found at the reference link below: Reference: http://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/4606-8.html 


Q143. DRAG DROP 

Drag and drop the VLAN number on the left to the corresponding default VLAN name on the right. 

Answer: 


Q144. Refer to the exhibit. 

What is the PHB class on this flow? 

A. EF 

B. none 

C. AF21 

D. CS4 

Answer:

Explanation: 

This command shows the TOS value in hex, which is 80 in this case. The following chart shows some common DSCP/PHB Class values: 

Service 

DSCP value 

TOS value 

Juniper Alias 

TOS hexadecimal 

DSCP - TOS Binary 

Premium IP 

46 

184 

ef 

B8 

101110 - 101110xx 

LBE 

32 

cs1 

20 

001000 - 001000xx 

DWS 

32 

128 

cs4 

80 

100000 - 100000xx 

Network control 

48 

192 

cs6 

c0 

110000 - 110000xx 

Network control 2 

56 

224 

cs7 

e0 

111000 - 111000xx 

Reference: http://www.tucny.com/Home/dscp-tos 


Q145. Which TCP mechanism prevents the sender from sending data too quickly for the receiver to process? 

A. Congestion control 

B. Error detection 

C. Selective acknowledgement 

D. Flow control 

Answer:

Explanation: 

In data communications, flow control is the process of managing the rate of data transmission between two nodes to prevent a fast sender from overwhelming a slow receiver. It provides a mechanism for the receiver to control the transmission speed, so that the receiving node is not overwhelmed with data from transmitting node. 

Reference: http://en.wikipedia.org/wiki/Flow_control_(data) 


Up to the minute 400-101 ccie routing and switching pdf:

Q146. Refer to the exhibit. 

Which two corrective actions could you take if EIGRP routes from R2 fail to reach R1? (Choose two.) 

A. Configure R2 to use a VRF to send routes to R1. 

B. Configure the autonomous system in the EIGRP configuration of R1. 

C. Correct the network statement on R2. 

D. Add the interface on R1 that is connected to R2 into a VRF. 

Answer: B,D 

Explanation: 

In this question we are running VRF Lite on R1. VRF Lite is also knows as “VRF without 

running MPLS”. This is an example of how to configure VRF Lite with EIGRP: 

ip vrf FIRST 

rd 1:1 

ip vrf SECOND 

rd 1:2 

router eigrp 1 

no auto-summary 

address-family ipv4 vrf FIRST 

network 10.1.1.1 0.0.0.0 

no auto-summary 

autonomous-system 200 

exit-address-family 

address-family ipv4 vrf SECOND 

network 10.1.2.1 0.0.0.0 

no auto-summary 

autonomous-system 100 

exit-address-family 

interface FastEthernet0/0 

ip vrf forwarding FIRST 

ip address 10.1.1.1 255.255.255.0 

interface FastEthernet0/1 

ip vrf forwarding SECOND 

ip address 10.1.2.1 255.255.255.0 

The above example creates two VRFs (named “FIRST” and “SECOND”). VRF “FIRST” runs on EIGRP AS 200 while VRF “SECOND” runs on EIGRP AS 100. After that we have to add interfaces to the appropriate VRFs. From this example, back to our question we can see that R1 is missing the “autonomous-system …” command under “address-family ipv4 vrf R2. And R1 needs an interface configured under that VRF. 

Note. R2 does not run VRF at all! Usually R2 resides on customer side. 


Q147. What is the purpose of EIGRP summary leaking? 

A. to allow a summary to be advertised conditionally on specific criteria 

B. to allow a component of a summary to be advertised in addition to the summary 

C. to allow overlapping summaries to exist on a single interface 

D. to modify the metric of the summary based on which components of the summary are operational 

Answer:

Explanation: 

When you do manual summarization, and still you want to advertise some specific routes to the neighbor, you can do that using leak-map. Please read more about leaking routes here. 

http://www.cisco.com/c/en/us/td/docs/ios/iproute_eigrp/command/reference/ire_book/ire_i1. html#wp1037685. 


Q148. DRAG DROP 

Drag each OSPF route-type identifier on the left to its description on the right. 

Answer: 


Q149. Which three options are characteristics of a Type 10 LSA? (Choose three.) 

A. It is an area-local, opaque LSA. 

B. Data is flooded to all routers in the LSA scope. 

C. It is used for traffic-engineering extensions to OSPF. 

D. It is a link-local, opaque LSA. 

E. Data is flooded only to the routers in the LSA scope that understand the data. 

F. It is used for traffic-engineering extensions to LDP. 

Answer: A,B,C 


Q150. DRAG DROP 

Drag and drop the OSPF network type on the left to the correct traffic type category on the right. 

Answer: