When OSPF is enabled on a LAN interface, and the router is the only router connected to the subnet.
When OSPF is enabled on a point - to -point serial link, and that router has both the higher router ID and higher interface IP address on the link.
When OSPF is enabled on a Frame Relay point - to - point subinterface, has the lower RID and lower subinterfa ce IP address, and otherwise uses default OSPF configuration on the interface.
When OSPF is enabled on a working LAN interface on a router, and the router has been elected BDR.
None of the other answers is correct.
第1题：
A. the cause of routing errors.
B. the number of switches on the network.
C. the number of users on the network.
D. where network latency will occur.
第2题：
During planning you sit down and estimate the time needed for each task and total them to come up with the project estimate This duration is what you commit to complete the project. What is wrong with the scenario? ()
A.The team did not create the estimate and estimating tales too long using that method
B.The team did not create the estimate and a network diagram was not used
C.The estimate is too long and should be created by management
D.The project estimate should be the same as the customer's required completion date
第3题：
A.is to show
B.is to be shown
C.is showing
D.shows
第4题：
A.IP
B.ICMP
C.TCP
D.UDP
第5题：
A.RIP v1
B.RIP v2
C.IGRP
D.OSPF
E.BGP
F.EIGRP
第6题：
the following diagram is（） network topology structure
A.bus
B.star
C.ring
D.tree
第7题：
VPN connections allow users working at home or on the road to connect in a secure fashion to a （ ） corporate server using the routing infrastructure provided by a public internetwork (such as the Internet). From the user&39;s perspective, the VPN connection is a point-to-point connection between the user&39;s computer and a corporate （ ）. The nature of the （ ） internetwork is irrelevant to the user because it appears as if the data is being sent over a dedicated （ ） link. VPN technology also allows a corporation to connect to branch offices or to other companies over a public internetwork, while maintaining secure （ ）. The VPN connection across the Internet logically operates as a wide area network link between the sites.
A.customer B.network C.remote D.local A.router B.client C.host D.server A.medium B.intermediate C.remote D.local A.network B.private C.public D.local A.technology B.server C.host D.communications
第8题：
Planning to stow ______ in the end lower holds will result in much broken stowage.
A.large crates or cases
B.small curved items
C.drums
D.filler cargo
第9题：
A.172.22.243.127
B.172.22.243.191
C.172.22.243.190
D.10.16.33.98
E.10.17.64.34
F.192.168.1.160
第10题：
GM cannot be used as an indicator of stability at all angles of inclination because ______.
A.M is not fixed at large angles
B.there is no M at large angles
C.G is not fixed at large angles
D.there is no G at large angles