Articles That Might Interest:

Cisco Routers

How To Configure DHCP Server On A Cisco Router

DHCP (Dynamic Host Configuration Protocol) is the protocol used by network devices (such as PCs, network printers, etc) to automatically obtain correct network parameters so they can access network a…

Network Cabling

10Base-T/2/5/F/35 - Ethernet

The 10Base-T UTP Ethernet and 10Base-2 Coax Ethernet were very popular in the early to mid 1990's when 100 Mbps network cards and hubs/switches were very expensive. Today's prices have dropped so muc…

Routing

OSPF - Part 3: OSPF Adjacency & Neighbor Forming…

This is the thrid article of our 6-part OSPF series (see below) that describes how OSPF routers perform neighbor relationship and adjacency. We’ll examine how OSPF discovers neighbors by sending Hell…

ICMP Protocol

ICMP Protocol - Part 7: Time Exceeded Message Ana…

The ICMP - Time Exceeded message is one which is usually created by gateways or routers. In order to fully understand this ICMP message, you must be familiar with the IP header within a packet. Our r…

OpManager - Network Monitoring & Management

Ensuring Enterprise Network Readiness for Mobile…

Demands for Enterprise networks to properly support mobile users is on a continuous rise making it more than ever necessary for IT departments to provide high-quality services to its users. This arti…

Cisco Services & Technologies

Unified Communications Components - Understanding…

What Is Unified Communications (UC)? Unified communications is a very popular term these days and we see it appearing on almost every vendor as they rename their platforms and products to incl…

TCP - UDP Protocol Analysis

UDP Protocol - Header

This article covers the UDP protocol. We examine the structure of the UDP header, the protocols that use UDP as a transport plus a lot more. Some common protocols which use UDP are: DNS, TFTP, ARP…

Cisco CallManager-CCME

Cisco CallManager Express CME v8.8 & v9.0 GUI Web…

Cisco's CallManager Express GUI interface is an important part of the CallManager Express product as it provides the ability to administer CME via a web browser. Generally, the CME GUI interface is e…

Cisco Routers

How to Capture Packets on your Cisco Router with…

If you’re tired of setting up SPAN sessions to capture network traffic transiting your network and Cisco router, it’s time to start using Cisco’s Embedded Packet Capture (EPC), available from IOS 12…

SASE & SD-WAN Networks

SASE and VPNs: Reconsidering your Mobile Remote A…

The Virtual Private Network (VPN) has become the go to security solution for keeping communications between networks and endpoints secure. After all, VPNs offer a straightforward, secure method for c…

The OSI Model

The OSI Model: Layer 3 - Network Layer

The Network layer is responsible for routing through an internetwork and for networking addressing. This means that the Network layer is responsible for transporting traffic between devices that are…

Routing

Enhanced Interior Gateway Routing Protocol - EIGRP

Enhanced Interior Gateway Routing Protocol (EIGRP), similar to IGRP, is a Cisco proprietary routing protocol that is used to exchange routing information between different routers within a network. E…