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Networking (Routers (Don't connect devices of the same network…
Networking
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The source needs the MAC address of the destination. Therefore, it send ARP (Address Resolution Protocol) broadcast message to find MAC.
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When a packer moves through a router towards the destination, the MAC address changes.
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Switch
Uses SAT table - Source Address Table to memorize the host information (Mac address of Host and interface).
If a switch does not know the destination MAC address, the switch will flood it.
Each switch maintains its own SAT #
Routers
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Connected to a router you'd find either a switch, or another router.
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Metrics are values that routers use to determine the best way to get to a destination network when there are multiple paths available.
Autonomous System Number
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IGP : Interior Gateway Protocol - is a routing protocol that allows routers within an autonomous system to communicate with each other.
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Routing Protocols are OSPF, EIGRP (Cisco) and BGP :red_flag:
EGP : Exterior Gateway Protocol - allows routers from different autonomous systems to communicate with each other and exchange info. The only EGP in usage today, which is used across the entire Internet, is BGP : Border Gateway Protocol.