BGP runs over a reliable transport ( ). This eliminates the need to implement explicit update fragmentation, retransmission, acknowledgement, and (请作答此空). Any authentication scheme used by the tran

题目
BGP runs over a reliable transport ( ). This eliminates the need to implement explicit update fragmentation, retransmission, acknowledgement, and (请作答此空). Any authentication scheme used by the transport protocol may be used in addition to BGP's own ( )mechanisms. The error notification mechanism used in BGP ( )that the transport protocol supports a “graceful” close, i.e., that all outstanding data will be delivered ( )the connection is closed.

A.synchronization
B.conflict
C.transport
D.sequencing
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相似问题和答案

第1题:

Where a container,pallet or similar article of transport is used to consolidate goods,the number of packages or units enumerated in the bill of lading as packed in such article of transport ______ to be the number of packages or units in calculating the amount beyond which the carrier or the ship is not reliable.

A.Is deemed

B.Are deemed

C.Deems

D.Deem


正确答案:A

第2题:

BGP协议基于TCP协议,端口(请作答此空)。BGP协议中,路由器通过( )报文报告检测的错误信息。

A.177
B.178
C.179
D.180

答案:C
解析:
BGP常见四种报文,分别是OPEN报文、KEEPLIVE报文、UPDATE报文、NOTIFICATION报文。
OPEN报文:建立邻居关系;
KEEPALIVE报文:保持活动状态,周期性确认邻居关系,对OPEN报文回应;
UPDATE报文:发送新的路由信息;
NOTIFICATION报文:报告检测到的错误。

第3题:

Which message is used to transport routing information between BGP peers?()

A. Open

B. Active

C. Update

D. Keepalive


参考答案:C

第4题:

在BGP4协议中,路由器通过发送(请作答此空)报文将正常工作信息告知邻居。当出现路由信息的新增或删除时,采用( )报文告知对方。

A.hello
B.update
C.keepalive
D.notification

答案:C
解析:
(1)OPEN报文:建立邻居关系。(2)KEEPALIVE报文:保持活动状态,周期性确认邻居关系,对OPEN报文回应。(3)UPDATE报文:发送新的路由信息。(4)NOTIFICATION报文:报告检测到的错误。

第5题:

在BGP4协议中,(请作答此空)发送新的路由信息,( )报文报告检测到的错误。

A.打开(open)
B.更新(update)
C.保持活动(keepalive)
D.通告(notification)

答案:B
解析:
BGP常见四种报文:OPEN报文、KEEPLIVE报文、UPDATE报文和NOTIFICATION报文。(1)OPEN报文:建立邻居关系。(2)KEEPLIVE报文:保持活动状态,周期性确认邻居关系,对OPEN报文回应。(3)UPDATE报文:发送新的路由信息。(4)NOTIFICATION报文:报告检测到的错误。

第6题:

若将Workers表的插入权限赋予用户User1,并允许其将该权限授予他人,那么对应的SQL语句为“GRANT(请作答此空)TABLE Workers TO User1( );”。

A.INSERT
B.INSERT ON
C.UPDATE
D.UPDATE ON

答案:B
解析:

第7题:

BGP协议基于TCP协议,端口( )。BGP协议中,路由器通过(请作答此空)报文报告检测的错误信息。

A.Update
B.Keepalive
C.Open
D.NOTIFICATION

答案:D
解析:
BGP常见四种报文,分别是OPEN报文、KEEPLIVE报文、UPDATE报文、NOTIFICATION报文。OPEN报文:建立邻居关系;KEEPALIVE报文:保持活动状态,周期性确认邻居关系,对OPEN报文回应;UPDATE报文:发送新的路由信息;NOTIFICATION报文:报告检测到的错误。

第8题:

Which one of the following statements about BGP is FALSE?()

A. BGP uses TCP port 179.

B. BGP ensures reliability of updates by using the reliable transport services of TCP.

C. The network command with the mask option never insta lls a prefix into the BGP table unless there is a matching prefix exists in the IP route table.

D. A TCP connection is required before exchanging updates.

E. BGPuses notification and the update messages to establish and maintain the BGP neighbor relati onship.


参考答案:E

第9题:

All three types of cryptography schemes have unique function mapping to specific.For example,the synunetric key(71)approach is typically used for theencryption of data providmg(72),whereas asymmetric key cryptography is maidy used in key(73)and noruepudiation,thereby providing confidentiality and authentication.The hash(74)(noncryptic),on the other hand,does not provide confidentiality but provides messageintegrity,and cryptographic hash algorithms provide message(75)and identity of peers during transport over insecure channels.
请作答72题。

A.Conduction
B.confidence
C.confidentiality
D.connection

答案:C
解析:

第10题:

两个自治系统(AS)之间的路由协议是( )。BGP协议端口号为(请作答此空)。

A.177
B.178
C.179
D.180

答案:C
解析:
两个自治系统(AS)之间的路由协议是BGP。BGP协议端口号为179。

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