单项选择题Which command can be a router to verify the layer 3 path to a host?()

A. traceroute address
B. tracert address
C. ssh address
D. telnet address


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2.单项选择题A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?()

A. The address is a broadcast address
B. The Ehernet interface is faulty
C. VLSM-capable routing protocols must be enable first on the router.
D. This address is a network address.

3.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

4.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.

5.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

7.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

9.单项选择题Which type of EIGRP route entry describes a feasible successor?()

A. a primary route,stored in the routing table
B. a backup route,stored in the routing table
C. a backup route,stored in the topology table
D. a primary route,stored in the topology table

10.单项选择题How dose a DHCP server dynamically assign IP address to host?()

A. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
B. Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address must be made ,and another address is then assigned.
C. Addresses are leased to host.A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.
D. Addresses are permanently assigned so that the host uses the same address at all times.

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