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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 ...
Network Cabling

Unshielded Twisted Pair (UTP) - CAT 1 to CAT5, ...

Unshielded Twisted Pair (UTP) cable is most certainly by far the most popular cable around the world. UTP cable is used not only for networking but...
Network Fundamentals

Network Unicast - Its role and Importance

Unicast is a communication method used in computer networking where data is sent from a single sender to a specific destination device. In th...
Network Protocols

Understanding VPN IPSec Tunnel Mode and IPSec T...

IPSec’s protocol objective is to provide security services for IP packets such as encrypting sensitive data, authentication, protection against rep...

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Netflow Articles:

Complete Guide to Netflow: How Netflow & its Co...

This article will cover the basics of Netflow, including its use cases, Netflow supported devices, Netflow history, and variants. We’ll also dive i...

Netflow: Monitor Bandwidth & Network Utilizatio...

Monitoring network traffic & bandwidth usage via Netflow is mandatory for any type and size network. Gaining visibility into user traffic, appl...

Netflow vs SNMP. Two Different Approaches to Ne...

SNMP (Simple Network Management Protocol) and Netflow are both popular protocols with admins, prized for their ability to give visibility over the ...

NetFlow Analyzer: Free Download, Step-by-Step I...

In our previous article we explained how a Netflow Analyzer can help you gain visibility into your user traffic, application traffic and data flows...

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VLAN Networks

Comparing Traditional Flat & VLAN Networks

Designing and building a network is not a simple job. VLANs are no exception to this rule, in fact they require a more sophisticated approach because of...
VLAN Networks

VLANs - IEEE 802.1q Trunk Link Protocol Analysis

While the VLAN Tagging article briefly covered the IEEE 802.1q protocol this article will continue building upon it by further analyzing the IEEE 802.1q...
VLAN Networks

VLANs - Access & Trunk Links

If you've read our previous article The VLAN Concept - Introduction to VLANs  then you should feel comfortable with terms such as 'VLAN', 'Sta...
VLAN Networks

VLAN Tagging - Understanding VLANs Ethernet Frames

We mentioned that Trunk Links are designed to pass frames (packets) from all VLANs, allowing us to connect multiple switches together and independently ...

Routing

Hybrid Routing Protocols - Advantages and Disadvanta...

Hybrid routing protocols are a combination of distance-vector and link-state routing protocols, and are used to provide a more efficient and scala...
Routing

OSPF - Part 4: OSPF Neighbor States – OSPF Neighbor ...

This is the third article of our OSPF series which analyzes the different OSPF States routers go through during the OSPF discovery and neighbor forming ...
Routing

OSPF - Part 5: Analysis of OSPF Link State Update (L...

This article explains how OSPF uses Link State Advertisement (LSA) to exchange information about the network topology between routers. When a router rec...
Routing

OSPF - Part 3: OSPF Adjacency & Neighbor Forming Pro...

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 exami...

Cisco Routers

How To Fix Cisco Configuration Professional (CCP) 'J...

Our previous article covered how to fix the Cisco Configuration Professional display/window problem where the CCP application is displayed in about one ...
SASE & SD-WAN Networks

Key Features of a True Cloud-Native SASE Service. Se...

Secure Access Service Edge (SASE) is an architecture widely regarded as the future of enterprise networking and security. In previous articles we talked...
Network Protocol Analyzers

Introducing Colasoft Unified Performance Management

Colasoft Unified Performance Management (UPM) is a business-oriented network performance management system, which analyzes network performance, quality,...
Cisco Routers

Enabling & Configuring SSH on Cisco Routers. Restric...

This article shows how to configure and setup SSH for remote management of Cisco IOS Routers. We’ll show you how to check if SSH is supported by your IO...