BAN, LAN, MAN and WAN
Ring Topology, star, extended star
OSI Model
Application, presentation, session, transport, network, datalink, physical
Application:to allow access to network resource, FTP, http
Presentation: to translate, encrypt, & compress data
Session: to establish, manage, and terminate sessions
Transport: reliable process-to-process msg delivery, tcp, udp
network: packet transport and internetworking
data link: bits -> frames, hop-to-hop delivery
physical: transmit bits over a medium
Each layer communicate logically with intermediate node.
RTT: Round Trip Time
WAN is much greater than that of LAN.
TCP flow control -> Three way handshake,
