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The OSPF RFC 3

题目

The OSPF RFC 3623 Graceful Restart feature allows you to configure IETF NSF in ultivendor networks. When using OSPF Graceful Restart，which mechanism is used tocontinue forwarding packets during a switchover？（）

  • A、Reverse Path Forwarding
  • B、Hardware-based forwarding
  • C、UDP forwarding
  • D、Layer 2 Forwarding
参考答案和解析
正确答案:B
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相似问题和答案

第1题：

Which router translates the Type 7 LSAs into Type 5 LSAs, according to RFC 1587 (OSPF NSSAOption) in an OSPF NSSA with more than one ABR?()

A. The router receiving the route translates the Type 7 LSA into a Type 5 LSA.

B. The ABR with the lowest router ID translates all Type 7 LSAs into Type 5 LSAs.

C. The ABR with the highest router ID translates all Type 7 LSAs into Type 5 LSAs.

D. All ABRs translate the Type 7 LSAs into Type 5 LSAs depending on which one has the lowest cost to the route.


参考答案：C

第2题：

SIP基本协议是定义在下列()文档中的?()

A.RFC3525

B.RFC3261

C.RFC3262

D.RFC3264


参考答案：B

第3题：

描述SNMPv1规范的RFC文档是()

A.RFC1157

B.RFC1155

C.RFC1212

D.RFC1213


参考答案：A

第4题：

The Dev － 1 and Dev －3 routers are OSPF neighbors over the Ethernet 0／0 connection. Based on the show ip ospf neighbor output from the Dev － 1 and Dev － 3 routers, which statement is true?()

A. Dev - 1 is the DR because it has a lower OSPF router ID

B. Dev - 3 is the DR because it has a higher OSPF router priority

C. Both Dev - 1 and Dev - 3 are using the def ault OSPF router priority

D. Dev - 3 is the DR because it has a lower OSPF router ID

E. Dev - 1 is the DR because it has a higher OSPF router priority


参考答案：E

第5题：

Refer to the exhibit. The partial configuration for an OSPF ASBR and an Area 0 ABR is shown. Assume the OSPF configurations throughout the network are operable. Which statement about these configurations is true? （）

A. The ASBR route - maps are basically useless, because there are no deny prefix - lists.

B. LSA Type 5s wil l not be received by the ABR from the ASBR.

C. The OSPF backbone will not learn any RFC 1918 addresses.

D. The matched prefix - list addresses will be given a metric of 255, which is essentially unreachable.


参考答案：C

第6题：

SIP的SDPoffer/answer机制是定义在()RFC文档?()

A.RFC3264

B.RFC3262

C.RFC3525

D.RFC3261


参考答案：D

第7题：

关于XMPP协议的描述中，正确的是

A.由3个RFC文档组成

B.核心协议是RFC3922

C.采用HTML数据格式

D.采用E-mail地址格式


正确答案：D
XMPP协议是一种基于XML的即时通信协议，它由4个RFC文档组成。其中，RFC3920是核心协议，RFC3921负责即时通信，RFC3922负责XMPP与CPIM的映射，RFC3923负责安全并采用E-mail的地址格式。根据解析，选项D符合题意，故选择D选项。

第8题：

目前使用的OSPF协议是其第二版,定义于RFC()和RFC()。


答案：RFC1247，RFC1583

第9题：

Refer to the diagram. Which OSPF configuration command is required to configure Area 3 a s atotally stubby area?()

A. On the ABR router ospf 10 area 3 stub

B. On all Area 3 routers router ospf 10 area 3 stub

C. On all Area 3 routers router ospf 10 area 3 stub no - summary

D. On the ABR router ospf 10 area 3 nssa

E. On the ABR rou ter ospf 10 area 3 stub no - summary


参考答案：E

第10题：

WhenimplementingbestpracticesforIPSourceAddressSpoofingandDefeatingDenialofServiceAttackswithIPSourceAddressSpoofing,whatRFCiscommonlyusedtoprotectyournetwork?()

A.RFC1149

B.RFC3704

C.RFC1918

D.RFC2827


参考答案：D

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