Types of WAN Links

I’ve found this table that I created a while ago and it lists common WAN connections that businesses use. I have used this table like a reference guide to familiar myself into other protocols. People don’t think of it much but the WAN is a different beast compared the LAN as it uses different protocols besides Ethernet. The WAN or wide area […]

Read More Types of WAN Links

The Codes of ICMP

In today’s post I wanted to talk about the widely used Ping command. Which is one of the best methods (I think) to begin network troubleshooting. When part of the network goes down it is sometimes hard to figure out why? When you issue the ping command or the extended ping command in a Cisco router several […]

Read More The Codes of ICMP

The Beginnings of Layer Two Redundancy

In a perfect world we would never need redundancy on a network infrastructure, but as you know as well as I know we don’t live in a perfect world. Hardware will eventually fail, bottlenecks will appear, and the speed of our network will become slower when we max the bandwidth on links. So having redundancy in routers, connections, and having a […]

Read More The Beginnings of Layer Two Redundancy

Cisco Discovery Protocol

In today’s post let’s talk about CDP the Cisco Discovery Protocol. This protocol helps us in two ways, it first helps us verify that a connection between router or switch is set up correctly  at least up to layer two in the OSI model. This also helps us discover Cisco devices that are in are network and which interfaces these devices […]

Read More Cisco Discovery Protocol

Distance Vector Routing

Couple weeks ago I talked about routing protocols and in the post I mentioned two routing protocol features distance vector and link state. Although these protocols fundamentally do the same thing by getting information on remote networks they get this information in a different way. For today let’s introduce distance vector routing.

Read More Distance Vector Routing