NetWare第二级容错主要是 ______。A．针对文件服务器失效而设计的B．针对硬盘表面介质损坏而设计的C

A. single ATM header

B. single Ethernet header

C. ATM header followed by a PPP header

D. ATM header followed by an Ethernet header

A.Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.

B.Ensure that cables A and B are straight-through cables.

C.Ensure cable A is plugged into a trunk port.

D.Ensure the switch has power.

E.Reboot all of the devices.

F.Reseat all cables.

A、Giving some advice

B、Presenting background information

C、Asking some questions

D、Providing statistics

E、Citing a quotation

A、The Presentation layer

B、The Controller layer

C、The Bean layer

D、The Mediator layer

A. end-to-end communications path

B. hosts on the same Layer 2 broadcast domain

C. hosts on the same Layer 3 broadcast domain

D. routing information on participating Layer 3 devices

A．Presentation Layer

B．Conversation Layer

C．Transport Layer

D．Network Layer

A.Filtering can occur based on Layer 3 information.

B.Broadcasts are eliminated.

C.Routers generally cost less than switches.

D.Broadcasts are not forwarded across the router.

E.Adding a router to the network decreases latency.

A. source address

B. options

C. sequence number

D. sources

E. destination port

F. checksum

A.Filtering can occur based on Layer 3 information.

B.Broadcasts are eliminated.

C.Routers generally cost less than switches.

D.Broadcasts are not forwarded across the router.

E.Adding a router to the network decreases latency.