CCNA Router and Catalyst Switch IOS Command Reference By Jamison Schmidt This reference guide provides router and switch commands to help you prepare for Cisco's CCNA certification exam. This guide covers IOS version 11 and higher. We will try to get VLSM and Supernetting commands added for the new 640-801 CCNA exam. Reference Quick Links Router Commands Show Commands Catalyst Commands Router Commands Terminal Controls: · Config# terminal editing - allows for enhanced editing commands · Config# terminal monitor - shows output on telnet session · Config# terminal ip netmask-format hexadecimal|bit-count|decimal - changes the format of subnet masks Host Name: · Config# hostname ROUTER_NAME Banner: · Config# banner motd # TYPE MESSAGE HERE # - # can be substituted for any character, must start and finish the message Descriptions: · Config# description THIS IS THE SOUTH ROUTER - can be entered ...
Common Networking Protocols TCP - TCP breaks data into manageable packets and tracks information such as source and destination of packets. It is able to reroute packets and is responsible for guaranteed delivery of the data. IP - This is a connectionless protocol, which means that a session is not created before sending data. IP is responsible for addressing and routing of packets between computers. It does not guarantee delivery and does not give acknowledgement of packets that are lost or sent out of order as this is the responsibility of higher layer protocols such as TCP. UDP - A connectionless, datagram service that provides an unreliable, best-effort delivery. ICMP - Internet Control Message Protocol enables systems on a TCP/IP network to share status and error information such as with the use of PING and TRACERT utilities. SMTP - Used to reliably send and receive mail over the Internet. FTP - ...
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