5 Free VoIP Softphones

softphone

The steady rise in people using IP telephony to communicate — for personal and business reasons — has led to the development of a number of different VoIP “softphones” that […]

How Spanning Tree Protocol Works

Spanning Tree Protocol

Spanning Tree Protocol (STP) is a bridge-to-bridge protocol developed by DEC. The DEC Spanning-Tree Algorithm was subsequently revised by the IEEE 802 committee and published in the IEEE 802.1D specification. […]

Install Android Apps to SD Card Without Rooting

SD-Increase-For-Android2

There are many android applications present on Google Play Store that are capable to move or install apps on SD Card.  When installing a new application on Android, it will […]

Recovery Ubuntu GRUB Bootloader After Installing Windows (Dual-Boot)

GRUB Bootloader

Grub 2 typically gets overridden when you install Windows or another Operating System. To make Ubuntu control the boot process, you need Reinstall (Repair/Restore) Grub using a Ubuntu Live CD. […]

Class C Network Addressing

Class C Network Address

For Class C networks, the RFCs define the first 2 bits of the first octet as always turned on, but the third bit can never be on. You can follow […]

Class B Network Addressing

Class B Network Address

In a Class B network,  the request for comments (RFCs) state that the first bit of the first byte must always be turn on, but the second bit must always […]

Class A Network Addressing

Class A Network Address

The designers of the IP address scheme said that the first bit of the first byte in a Class A network address must always be off, or 0. This means […]

Queries and Page Load Time in WordPress

Queries and Page Load Time

WordPress is a blog engine built with PHP programming language and MySQL database, so that each time the blog is accessed, there will be demand query to the database prior […]

Configuring NTP on Cisco Device

Cisco Device

Network Time Protocol (NTP) is a protocol for distributing the Coordinated Universal Time (UTC) by means of synchronizing the clocks of computer systems over packet-switched, variable-latency data networks. I’ve tried […]

Elastix External Call Disconnect After 6 Seconds

Elastix

How to solve elastix server problem to call and disconnect/drop call after 6 seconds? When you try to call someone there is the call hangup automatically right after 5 or […]