juniper认证考试

On which destination port in the Layer 4 header does BGP listen?()A、UDP port 169B、TCP port 169C、UDP port 179D、TCP port 179

题目

On which destination port in the Layer 4 header does BGP listen?()

  • A、UDP port 169
  • B、TCP port 169
  • C、UDP port 179
  • D、TCP port 179
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相似问题和答案

第1题:

On which destination port in the Layer 4 header does BGP listen?()

A. UDP port 169

B. TCP port 169

C. UDP port 179

D. TCP port 179


参考答案:D

第2题:

What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table()。

A.The switch will not forward unicast frames.

B.The switch will forward the frame to a specific port.

C.The switch will return a copy of the frame out the source port.

D.The switch will remove the destination MAC from the switch table.

E.The switch will forward the frame to all ports except the port on which it was received.


参考答案:B

第3题:

CFR,全称Cost and Freight(named port of destination)


参考答案:

中文意为“成本加运费(指定目的港)”,指在装运港货物越过船舷时卖方即完成交货,卖方须支付将货物运至指定目的港所需的运费。但货物的风险是在装运港船舷转移的。该术语适合于海运或内河运输。CFR价与下列CIF价相比,在价格构成中少了保险费,因此,除了保险是由买方办理外,其他的双方义务与下列CIF价基本相同。应该注意的是,CFR价装船是卖方而投保又是买方,卖方在装船后应给买方以充分的通知,否则,因此而造成买方漏保引起的货物损失应由卖方承担。


第4题:

You examine the port statistics on a Cisco Catalyst switch and notice an excessive number offrames are being dropped. Which of the following are possible reasons for the drops?()

  • A、Unknown destination MAC address
  • B、Bad cabling
  • C、MAC forwarding table is full
  • D、Port configured for half duplex
  • E、Port configured for full duplex
  • F、Network congestion

正确答案:B,F

第5题:

汉译英:“装运港;卸货港”,正确的翻译为( )。
A. port of transfer ; port of discharge B. port of loading ; port of discharge
C. port of transfer ; port of destination D. port of loading ; port of desdnafion


答案:B
解析:

第6题:

Your boss is learning a CCNA training course,refer to the exhibit.The access list has been configured on the S0/0 interface of router RTB in the outbound direction.Which two packets,if routed to the interface,will be denied?()access-list 101 denytcp192.168.15.320.0.0.15any eq telnetaccess-list 101 permitip any any

A.source ip address:192.168.15.5;destination port: 21

B.source ip address:,192.168.15.37 destination port: 21

C.source ip address:,192.168.15.41 destination port: 21

D.source ip address:,192.168.15.36 destination port: 23

E.source ip address:192.168.15.46;destination port: 23

F.source ip address:,192.168.15.49 destination port: 23


参考答案:D, E

第7题:

根据下图,该access list被配置在路由器RTB的S0/0接口上的OUT方向,哪两个数据包会被DENY,如果被路由到该接口上的话?()

A.source ip address:192.168.15.5 destination port:21

B.source ip address:192.168.15.37 destination port:21

C.ssource ip address192.168.15.41 destination port:21

D.source ip address:192.168.15.36 destination port:23

E.source ip address:192.168.15.46 destination port:23

F.source ip address:192.168.15.49 destination port:23


参考答案:D, E

第8题:

In JUNOS software with enhanced services, which three packet elements are inspected to determineif a session already exists? ()(Choose three.)

A. IP protocol

B. IP time-to-live

C. source and destination IP address

D. source and destination MAC address

E. source and destination TCP/UDP port


参考答案:A, C, E

第9题:

Which of the following descriptions about IP spoofing is correct?()

  • A、IP source address is forged
  • B、IP destination address is forged
  • C、IP TCP source port is forged
  • D、IP TCP destination port is forged
  • E、None of above

正确答案:A

第10题:

A standard IP access list is applied to an Ethernet interface of a router. What does this standard access list filter on?()

  • A、The source and destination addresses
  • B、The destination port number
  • C、The destination address
  • D、The source address
  • E、All of the above

正确答案:D

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