WANS Routers By Scott Burden Linnea Wong Cisco
WANS & Routers By Scott Burden & Linnea Wong Cisco Network Academy Semester 2
What is a WAN? 4 A Collection of LANs within 1 or many Autonomous networks. 4 Single or many remote Dial-up users. 4 A Collection of routers spread across a large geographic area. Router Cardiff Office H. Q. Router (CORE ROUTER) Branch Office Router Super Rep London office Router Edinburgh Office
Router Example WAN Cardiff Office Router LAN Branch Office LAN H. Q. (CORE ROUTER) Router LAN London office Router Super Rep LAN Edinburgh Office
Router WAN Types Cardiff Office Router LAN Branch Office’s Enterprise Network LAN H. Q. (CORE ROUTER) Stub Network Router Mobile LAN London office Router Users Super Rep LAN Edinburgh Office
Wan and Routers 4 WANs operates at the 4 Routers operates at the physical layer and the data link layer of the OSI model 4 Connects devices that are seperated by wide geographical areas network layer of the OSI model 4 Communicates with each other using WAN connections with the help of routing protocols and routed protocols
Router’s Functions 4 Selection of best path for incoming data packets 4 Switching of packets to the proper outgoing interfaces
Router’s Protocols 4 Routing protocols – enables a packet to be forwarded from one host to another based on the addressing scheme 4 Routed protocols – provides mechanisms for sharing routing information between routers to update the routing tables
A Router’s Internal Configuration 4 RAM/DRAM 4 NVRAM 4 Flash 4 ROM 4 Interface.
Different roles of a Router 4 Internal routers 4 Area border routers 4 Backbone routers 4 Autonomous system boundary routers
Router Capacities 4 H. Q. would typically have a large core router at the heart of the enterprise network such as a Cisco 6000. 4 Other major offices would have scalable devices such as Cisco 2500/3600 series routers with spare interface capacity. 4 Whereas Branch offices would generally have Cisco 1600/1700 series routers.
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- Slides: 11