I know NIM means network interface module in the name "NIM-ES2-4". But what does "ES" stands for? Does it stand for "Ethernet Switch"? Thanks.

In Cisco router IOS, what's the differences between "ip domain lookup" and "ip domain-lookup"? When to use each? Thanks.

I'm pretty new to networking and still learning CCNA stuff. I'm reading a book and as I understand, when you are connecting two routers using a serial line, one router is considered DCE and the other is DTE. The DCE side should set clock rate in orde...

 In a IOS command line, I can use the "include" command to filter piped results.PC1#show running-config | include inter interface FastEthernet0/0 interface FastEthernet0/1 interface FastEthernet1/0 interface FastEthernet1/1 PC1#How can I , or is it p...