日韩欧美亚洲 _ 欧美亚洲一区 _ 日本亚洲欧美 _ 亚洲精品欧美 国产白袜脚足J棉袜在线观看_亚洲熟妇av一区二区三区_久久天天躁狠狠躁夜_精品众筹模特私拍在线

單項選擇題

The SCTP layer in the C7 signalling protocol stack is responsible for which of the following:()

A. Establishing a signaling channel between two signaling entities in an ATM network
B. Provide reliable connection for signaling between two IP signaling nodes
C. Provide routing for IP signaling messages in an IP signaling network

微信掃碼免費搜題