H12-261 Questions And Answers


Exam Name: HCIE-R&S (Written) (Expert - Routing & Switching)

Updated: 2019-01-19

Q & A: 263

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Question No : 1

As shown, in the configuration of router R3 set ISIS overload bit , which of the following statement is True? (Multiple choice)

A. R3 starts overload state, R1 and R2 will not calculate the R3 generated LSP in SPF tree.
B. R3 LSP will not be able to spread to R1 and R2.
C. R3 direct route because of the overload bit set will be ignored by R1 and R2.
D. R3 imported routes through import-route will not be able to publish.
E. when router memory is insufficient, the system will automatically set the overload flag bit in sent LSP packets, it is irrelevant to whether the user configure the set-overload command.
Answer: DE

Question No : 2

Here on the OSI reference model, which description about the sixth layer functional is corret?
A. Providing a common data compression and encryption scheme
B. Establishing, maintaining and terminating communication sessions
C. Synchronous Communication
D. Determining the availability of resources
Answer: A

Question No : 3

If there is a switch running STP, and now the switch G0/0/17 interface and G0/0/18 interface are connected by a cable, then on the scenario described below, which is correct?
A. G0/0/18 interface will enter the discarding state
B. Both G0/0/17 interface and G0 0/18 interface will enter the forwarding state
C. G0/0/17 interface will enter the blocking state
D. Both G0/0/17 interface and G0/0/18 interface will enter the discarding state.
E. G0/0/18 interface will continue change back and forth in listening state and learning state
F. G0/0/17 interface will always remain in the learning state
Answer: A

Question No : 4

In the whole HW IP multicast network running SSM
Which of the following understanding of SSM is true? (Multiple choice)
A. don't need the RP
B. SSM only use the shared tree
C. SSM only use STP tree
D. best suitable for 1 to many application
E. SSM is recommended to use when having multiple sources and expect to minimize mroute state in the network
F. the most suitable for the application of many-to-many
Answer: ACD

Question No : 5

An existing As-path-filter: ip as-path-filter 1 permit ^ 100 (_100) * (- 400) * $, which AS-PATH attribute can not the As-path-filter match?
A. 100
B. 100 200 900
C. 100 400
D. 100 400 400 400
Answer: B

Question No : 6

Which description about ISIS extension feature is true? (Multiple choice)
A. ISIS can choose whether verification to received SNP and LSP data packets.
B. When the amount of information which ISIS will publish in link-state protocol data packet PDU is too large, ISIS router will generate multiple LSP fragment, to carry more ISIS information.
C. After enabled router LSP fragment extension function, don't need to restart ISIS process, you can use this feature.
D. If there are other vendors equipment on the network and does not support the LSP fragment function, must configure the fragment extension mode to Mode-1, or the other vendor's device can't identify the message.
Answer: ABD

Question No : 7

You want to set the DSCP value of VoIP traffic in HW network device as EF.
According to distinguish service model RFC, flow mark EF should be set to:
A. DSCP is set as decimal 36
B. IP ToS is set as 0xEF
C. IP Experimental ECN
D. DSCP is set as decimal 5
E. Bit Stream 101110
Answer: E

Question No : 8

HW users are very much transmission via TFTP file.
What protocol is relied on by TFTP for transmission?
B. IP and TCP
Answer: E

Question No : 9

In RIPng network, hope the router can publish a default route to the entire network, which of the following configuration is True?
A. [Huawei] ripng 1
[Huawei-ripng-1] import-route static cost 2
[Huawei-ripng-1] quit
[Huawei] ipv6 route-static:: 0 NULL0
B. [Huawei] interface GigabitEthernet0/0/1
[Huawei-GigabitEthernet0/0/1] ipv6 enable
[Huawei-GigabitEthernet0/0/1] ipv6 address 2001 £º 12::1/64
[Huawei-GigabitEthernet0/0/1] ripng 1 enable
[Huawei-GigabitEthernet0/0/1] ripng default-route originate
[Huawei-GigabitEthernet0/0/1] quit
C. [Huawei] ripng 1
[Huawei-ripng-1] import-route static cost 2
[Huawei-ripng-1] quit
[Huawei] ipv6 route-static:: 0 2001:19::9
D. [Huawei] ripng 1
[Huawei-ripng-1] ripng default-route originate
[Huawei-ripng-1] quit
Answer: B

Question No : 10

You want to make sure that key business in the network HW get high priority.
which field does IP Precedence of data packets based on to set?
A. All the 8 bit of ToS field
B. the first 4, 5 and 6 bit in ToS field
C. three least significant bits in ToS field
D. three most significant bits in ToS field
Answer: D

Question No : 11

Which of the following information does STP based on to calculate path cost?
A. interface bandwidth
B. interface delay
C. interface bandwidth and delay
D. hops
E. bridge priority
Answer: A

Question No : 12

Which type of prefix will router running BGP circular to their IBGP neighbor (assuming that the router is not configured as a route reflector)?
A. prefix is learned through other BGP neighbors, or prefix is introduced by the local network or routing learned
B. the prefix exists in the routing table
C. prefix is learned through EBGP neighbors, or prefix is introduced by the local network or routing learned
D. prefix is learned through EBGP neighbors, or learn the prefix from the RR
E. prefix is learned through other IBGP neighbors, or prefix is learned from EBGP neighbor, or the prefix is introduced by routing learned
E. prefixe learned through other IBGP neighbors, or learn the prefix from the RR
Answer: C

Question No : 13

You have two routers run BGP connected to different ISP. You want to affect the Internet into your network traffic, but your company is prohibited to use BGP communities.
The best way to achieve the aforementioned requirements?
A. the router's cost adjustment
B. use MED
C. increase the router PreVal
D. reduce the router's Local Preference
E. use AS-path additive
F. use Metrics
Answer: E

Question No : 14

AS-path-filter using regular expression ^[0-9]+$ to represent all the AS_PATH attribute.
A. True
B. False
Answer: B

Question No : 15

Which of the following can be used for BGP routing? (Multiple choice)
B. IP-prefix
C. AS-path-filter
Answer: ABC
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