Network And Security

Firewall DMZ

admin — Sat, 13 Mar 2010 08:08:47 +0000

Firewall DMZ – provides a segmentation of the network when you need to host public resources such as Web servers. Connecting our private network to the un-trusted network (aka the internet), we should control the flow of the traffic in a secured manner by a firewall device. With firewall, all the traffic are forced to pass [...]

How to Calculate Route Summarization

admin — Tue, 09 Mar 2010 08:49:46 +0000

In small inter-networking environments, the routers routing tables might only have a few dozens of routes. The larger the network, the larger the number of routes are. When the number of the routes in the router’s routing tables grows bigger and bigger, they consume more memory in the router and take more time in [...]

DNS Troubleshooting

admin — Thu, 04 Mar 2010 07:04:54 +0000

In business or enterprise class computer network infrastructures, a well designed DNS name resolution is very essential within the organization. And one of the most common internet access problems is caused by the failure of DNS name resolution. The inability to resolve DNS names can bring clients activities to a standstill. The ability to perform [...]

Cable Internet Connection

admin — Tue, 02 Mar 2010 10:38:53 +0000

When you sign up Cable broadband internet connection, generally the ISP provides you a Cable modem which has USB port, Ethernet port or both USB and Ethernet port. Typically the modem connects direct to a single computer via either USB or Ethernet port. What if you have more than one computer in home and would [...]

Router Guide

admin — Sat, 27 Feb 2010 07:44:04 +0000

A simple definition of the router is a networking device that is typically used to connect or segment the networks. This router guide discusses the routers in general, the types, what router you need, and how you can connect them. For a more detail about the hardware router as general can be found in the [...]

Workgroup LAN Switches

admin — Thu, 25 Feb 2010 07:15:43 +0000

In medium to large scales business and corporate LAN environments, the deployment of well managed workgroup LAN Switches with redundant links is very important. The deployment of the legacy Hubs must be avoided. Workgroup LAN Switches greatly improve the throughput of Ethernet networks. They allow the migration to mixed 10/100 Mbps and higher speeds, [...]

Multicast Traffic in LAN Environment

admin — Fri, 19 Feb 2010 08:08:03 +0000

Ethernet LAN addressing identifies either individual devices or groups of devices on a LAN. Unicast Ethernet addresses identify a single LAN card or a NIC (network interface card). Each address is 6 bytes long, is usually written in hexadecimal, and, in Cisco devices, typically is written with periods separating each set of four hex digits. [...]

Wireless Travel Router

admin — Thu, 04 Feb 2010 09:02:57 +0000

Wireless Travel router is typically used to protect your private network (your critical files in the Laptop) against any wide range of internet threats when you have to expose the laptop to the internet while you are in conference or hotel rooms or in any public hotspots. As general, a router is used to connect [...]

Sonicwall TZ 170

admin — Sun, 31 Jan 2010 14:43:56 +0000

Sonicwall TZ 170 is a total security appliance for SOHO, remote and branch offices, which includes an integrated 5-port auto-sensing MDIX switch. The ports can be configured for telecommuter Work-ports, and the dual-port WAN can be configured for redundant WAN links, or load-balance ISP Failover and Load Balancing or a second LAN for added network [...]

Cisco Router IOS

admin — Fri, 29 Jan 2010 01:14:55 +0000

Cisco Router IOS (Internetwork Operating System) is the Cisco router proprietary operating system. IOS includes all the program, commands, and configuration options that the router uses to run and complete the tasks.

In Cisco router IOS system, the command interpreter mode is called router EXEC which is a terminal emulator software to interact with the router. [...]