Cẩm nang dữ liệu không dây P13

UNDERSTANDING AIRTIME PROTOCOLS THE PACKET REVISITED A “packet” is the information unit formed when a message is partitioned into more manageable sections for transmission and recovery. Most landline packets have three logical subsections created when control information is added to user data (.igure 13-1). Packets are not required to travel only on packet switched networks. They function quite nicely on circuit switched systems as well—often a source of confusion for persons first encountering adaptive packet assembly in Microcom’s protocols sent over circuit switched facilities. ...