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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相关考题
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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
