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Data Communications basics (LAN (server, switch, circuit, client, router),…
Data Communications basics
WLAN
Client
router
circuit
LAN
server
switch
circuit
client
router
Type of networks
LAN
Local Area Network in room or build
A group of clients and servers that share a circuit
BN
Backbone Network (< a few km) high-speed connection between LANs
MAN
Metropolitan Area Network (> a few km) connect LANs and BNs across locations
WAN
Wide Area Network same as MAN except longer distances
Communication between computers
packet-switched
data transmission rates (bps)
techniques
abstraction (Internet model)
Application layer
Transport layer
Network layer
Data Link layer
Physical layer
ptotocols
Formal standard
ISO (OSI model)
ITU-T (ADSL)
IEEE (Ethernet, Wi-Fi)
IEFT (TCP/IP, HTTP)
De-facto standard