DOITJT的博客

Confidentiality: Only sender & receiver can understand message (sender encypt, receiver decrypt) Authentication: Sender & Receiver confirm each other's identity Message Integrity:Ensure message is not altered without detection Availability: net.

Wireless Hosts: End-system devices that run applications. A mobile host doesn't have to be portable/stationary.e.g.laptop, tablet, smartphone, or desktop computer Wireless Link:the link between hosts OR betwen a host and a base station. Links have 2 ke...

OverviewData PlaneLocal to one router, how to put a datagram from the input link to the output linkControl Plane Across many routers, end to end view, how to put a datagram from source to destination

Logical communication

Access NetworksThe network that physically connects an end system to the first router (also known as the “edge router”) on a path from the end system to any other distant end systemDifferent types of access networks:Residential access nets -- priva

Components Point of ViewHostsHosts = end systems = all connected computing devicese.g. PC, Servers, Laptops, Smart watches, etc.Communication links & PacketsEnd systems are connected together by a network of communication links and packet swit