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Cisco Routers

Cisco Router 'Privileged' Mode

To get into Privileged Mode we enter the "Enable" command from User Exec Mode. If set, the router will prompt you for a password. Once in Privileged Mode, you will notice the prompt changes from ">…

Linux - Unix

Installing Software On Linux

Installing software in Linux is very different from Windows for one very simple reason: most Linux programs come in 'source code' form. This allows you to modify any program (if you're a programmer)…

Cisco CallManager-CCME

How to Register Cisco IP Phones & Connect CallMan…

This article shows how to connect Cisco's Unified CallManager with a CallManager Express system (including UC520, UC540 and UC560) via H323 gateway, allowing the two systems to route calls between ea…

Ethernet Protocol, CSMA/CD, Collisions

Integrating Fast Ethernet into 10MB Ethernet Netw…

Now that Fast Ethernet is here, the question becomes, "How do I start using it ?" Integrating Fast Ethernet into existing networks need not be done all at once. Here are some aspects of 100Mbps impl…

Cisco Services & Technologies

Fix Cisco VPN Client Break After Windows 10 Anniv…

Windows 10 latest update 1607 code named Anniversary update promises to introduce a number of significant enhancements including breaking your trustworthy Cisco IPSec VPN client. After installing the…

Windows Servers

Windows Server 2016 Licensing Made Easy – Underst…

This article describes the new Windows Server 2016 Licensing model (per-core licensing) Microsoft has implemented for its new server-based operating system. While the Windows Server 2012 Licensing mo…

SASE & SD-WAN Networks

The Most Common Worst Networking Practices and Ho…

In the rush to keep pace with the many challenges facing today’s organizations, all too often networking teams end up adopting practices and processes that are, shall we say, less than perfect. You p…

Virtualization & VM Backup

SysAdmin Day 2020 - Get your Free Amazon Voucher…

SysAdmin Day has arrived, and with it, gratitude for all the unsung heroes that 2020 has needed. Your hard work has made it possible for all of us to keep going, despite all challenges thrown our way…

Linux - Unix

Linux BIND DNS - Part 2: Configuring db.domain Z…

It's time to start creating our zone files. We'll follow the standard format, which is given in the DNS RFCs, in order to keep everything neat and less confusing. First step is to decide on the doma…

Domain Name System (DNS)

The DNS Protocol - Part 2: DNS Queries & Resoluti…

This section will help you understand how the DNS queries work on the Internet and your home network. There are two ways to use the domain name system in order to resolve a host or domain name to an…

Linux - Unix

Understanding Linux File System Quotas - Installa…

When you are running your own web hosting, it is important to monitor how much space is being used by each user. This is not a simple task to be done manually since one of the users or group could fi…

SASE & SD-WAN Networks

Configuring A SASE Unified Network: Data centers…

This article explores the need for Secure Access Service Edge (SASE) in today’s organizations. We show how one of the most advanced SASE platforms available, combines VPN and VPN and SD-WAN capabilit…