页面打开中,请稍候...
www.Gzu521.com
| 贵州学习网—属于你的学习中心 |
|
第4套 lapb is a (1) protocol that provides complete data transparency in a (2)operation. it supports a peer-to-peer link in that neither end of the link plays the role of the permanent master station. hdlc lapb is the (3)that is usually used by(4), the (5)standard for packet switched networks. (1)a．bit-oriented synchronous b．byte-oriented synchronous c．bit-oriented asynchronous d．byte-oriented asynchronous (2)a．half-duplex point-to-point b．half-duplex point-to-points c．full-duplex point-to-point d．full-duplex point-to-points (3)a．physical layer b．link layer c．network layer d．transport layer (4)a．x.21 b．x.25 c．x.28 d．x.29 (5)a．itu b．ieee c．osi d．ansi 答案:1:a,2:c,3:b,4:b,5:a |
责任编辑：gzu521
您现在的位置：
