CCNA IN Delaware

ACL Access Control List | CCNA

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Rules Cisco routers support two types of ACLs: •Standard ACLs – ACLs only filter at Layer 3 using the source IPv4 address only. •Extended ACLs – ACLs filter at Layer 3 using the source and / or destination IPv4 address. They can also filter at Layer 4 using TCP, UDP ports, and optional protocol type information for … Read more

OSPF Packet Types

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The following list describes the five different types of OSPF link-state packets (LSP). Each packetserves a specific purpose in the OSPF routing process. 1. Hello: Used to establish and maintain adjacency with other OSPF routers 2. Database description (DBD): Contains an abbreviated list of the sending router’s link-statedatabase and is used by receiving routers to … Read more