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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: D
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
8
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: D
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: B
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: