Figure 1-3: Elements of a Network Client application Server Application Message(Frame) Access Switch Line 2 Client Server 6 Computer Wireless access Switch Points connect unk 3 Wireless Stations Line to switches Client Switch Outside World Wireless Access Point Router
11 Figure 1-3: Elements of a Network Wireless Access Point Mobile Client Router Outside World Server Computer Client Computer Switch 1 Switch 2 Switch 3 Switch 4 Message (Frame) Access Line Trunk Line Client Application Server Application 6. Wireless Access Points Connect Wireless Stations to Switches
Figure 1-3: Elements of a Network Client application Server Application Message(Frame) Access Switch Line 2 Client Server Computer Routers connect networks Computer Switch to the outside world Trunk treated just like computers Line in single networks Mobile Client witch Outside Yes, single networks can4 World contain routers uuv Router 12
12 Figure 1-3: Elements of a Network Wireless Access Point Mobile Client Router Outside World Server Computer Client Computer Switch 1 Switch 2 Switch 3 Switch 4 Message (Frame) Access Line Trunk Line Client Application Server Application 7. Routers connect networks to the outside world; Treated just like computers in single networks Yes, single networks can contain routers
Figure 1-3: Elements of a Network Client Applicatio erver Application 8. Access lines Connect Computers Access to Switches Switch Line 2 Client Server Computer Computer Switch Switch Trunk 3 Line Mobile Switch Outside 9. Trunk Lines Connect World Switches to switches and Switches to routers Router 13
13 Figure 1-3: Elements of a Network Wireless Access Point Mobile Client Router Outside World Server Computer Client Computer Switch 1 Switch 2 Switch 3 Switch 4 Message (Frame) Access Line Trunk Line Client Application Server Application 8. Access Lines Connect Computers to Switches 9. Trunk Lines Connect Switches to Switches and Switches to Routers
Figure 1-4: Packet Switching and Multiplexing Breaking Communications into Small Messages is called Packet Switching, even if the Messages are frames AC AC Client AC Server AC ComputerA ACBDAC Computer C Trunk Line BD Access BD/LIne Multiplexed Packets BD Share Trunk Lines Mobile client So Packet Switching Router D Computerb Reduces the Cost of Trunk Lines 14
14 Figure 1-4: Packet Switching and Multiplexing Client Computer A Mobile Client Computer B Router D Server Computer C AC AC AC AC AC AC BD BD BD BD Access Line Trunk Line Multiplexed Packets Share Trunk Lines So Packet Switching Reduces the Cost of Trunk Lines Breaking Communications into Small Messages is Called Packet Switching, even if the Messages are Frames
Network Elements: Recap Name the 9 elements of single networks Without looking back through your handout Never talk about an innovation"reducing cost increasing speed, etc without specifying Which element is cheaper or faster For example, multiplexing only reduces the cost of trunk lines other costs are not decreased 15
15 Network Elements: Recap • Name the 9 Elements of Single networks. – Without looking back through your handout Never talk about an innovation “reducing cost,” “increasing speed,” etc. without specifying which element is cheaper or faster. For example, multiplexing only reduces the cost of trunk lines; other costs are not decreased