单项选择题

What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?（）

A. lowest port MAC address
B. port priority number and MAC address.
C. VTP revision number
D. highest port priority number.
E. path cost

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热门试题

单项选择题Assuming default setting,how can you erase the VTP database of VLANs on a CISCO IOS switch running in VTP server mode?（）

A. Enable VTP pruning
B. From privileged mode ,erase the startup configuration file,then reload.
C. From privileged mode ,erase the vlan date file, then reload.
D. Cycle the switch power.

单项选择题Which of these represents an IPv6 link-local address?（）

A. FE08::280e:611:a:f14f:3d69
B. FE81::280f:512b:e14f:3d69
C. FE80::380e:611a:e14f:3d69
D. FEFE:0345:5f1b::e14d:3d69

单项选择题If an Ethernet port on a router was assigned an IP address of 172.1.1.1 20,what is the maximum number of hosts allowed on this subnet?（）

A. 4094
B. 1024
C. 8190
D. 2046
E. 4096

单项选择题Which IPV6 routing protocol uses multicast group FF02::9 to send updates?（）

A. RIPng
B. OSPFv3
C. static
D. IS-IS for IPv6

单项选择题What is the default maximum number of equal-cost paths that can be placed into the routing of a cisco OSPF router?（）

A. 16
B. 2
C. unlimited
D. 4