Chapter 1 NETWORKING BASICS Chapter 1 NETWORKING BASICS
Chapter 1 NETWORKING BASICS
Chapter 1: NETWORKING BASICS LANS, WANS, AND MANS § Three main networking technologies are used to connect computers and networks together: § Local area network (LAN) § Wide area network (WAN) § Metropolitan area network (MAN) 2
Chapter 1: NETWORKING BASICS LAN § Used to network computers located in a limited geographical area such as a room, floor, or building § Has three main attributes § Topology: bus, star, and ring § Medium: copper, fiber, and wireless § Protocols 3
Chapter 1: NETWORKING BASICS EXAMPLE OF A LAN 4
Chapter 1: NETWORKING BASICS 5 WAN § Spans a large geographic area § Defined as an internetwork (private or public) that connects many LANs § Uses routers and usually point-to-point links § Examples of WANs § The Internet § Private global enterprise networks
Chapter 1: NETWORKING BASICS EXAMPLE OF A WAN 6
Chapter 1: NETWORKING BASICS 7 PROTOCOLS AND SERVICES § Facilitate communication between two networked devices § Perform data encapsulation § Provide a common language to communicating devices § Provide either connectionless or connectionoriented services
Chapter 1: NETWORKING BASICS 8 CONNECTIONLESS VS. CONNECTION-ORIENTED § § Connectionless protocols § Do not require a connection § Have very little overhead § Are fast and unreliable Connection-oriented protocols § Require a connection § Require more overhead § Are slower and very reliable
Chapter 1: NETWORKING BASICS PHYSICAL LAYER TRANSMISSION 9
Chapter 1: NETWORKING BASICS NETWORK LAYER ADDRESSING 10
Chapter 1: NETWORKING BASICS ROUTING 11
Chapter 1: NETWORKING BASICS 12 SUMMARY § LANs, WANs, and MANs allow groups of computers to share information. § Signaling protocols are used to transmit data as 1 s and 0 s. § Protocols provide a common language for communication hosts.
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