单项选择题

What is the purpose of the OSPF hello packet？（）

A. advertises reachable networks
B. acknowledges the receipt of update packets
C. establishes and maintains neighbor relationships
D. describes the contents of the link-state database

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热门试题

多项选择题WhatarethethreeOSPFauthenticationmethodssupportedontheERXEdgeRouter？（）

A. null password
B. simple password
C. message digest 5
D. Password Authentication Protocol
E. Challenge Handshake Authentication Protocol

单项选择题WhenconfiguringOSPFontheERX，whatisthedefaultauto-costreference-bandwidthvalue？（）

A. 1 Mbps
B. 10 Mbps
C. 100 Mbps
D. 1000 Mbps

单项选择题Whywouldyoumakeanon-backboneareaastubornot-so-stubbyarea？（）

A. to aggregate routes learned from the ABR
B. to lower the cost of routes advertised by the ABR
C. to connect a non-contiguous area to the backbone
D. to decrease the size of the link-state database in that area

单项选择题DuringOSPFadjacencyformation，whatstateisarouterinwhenitissendingLSAheaderinformationtoitsneighbor？（）

A. Init
B. 2Way
C. ExStart
D. Exchange

单项选择题WhichstatementistrueaboutthefrequencyofOSPFLSAtransmissions？（）

A. They are configured per OSPF area.
B. They are configured per virtual router.
C. They are configured per OSPF process.
D. They are configured per OSPF interface.