My Netwok Dictionary

A broadcast address is an IP address that you can target you to all systems on a specific subnet instead of single hosts. The broadcast address of any IP address can be calculated by taking the bit compliment of the subnet mask , sometimes referred to as the reverse mask, and then applying it with a bitwise OR calculation to the IP address in question.

Some systems which are derived from BSD use zeros-broadcasts instead of ones-broadcasts. This means that when you create a broadcast address, you fill the host area of the IP address while displayed using binary values with zeros instead of ones. Most operating systems use ones-broadcasts. Read the rest of this entry »

127.0.0.1 is the standard IP address used for a loopback network connection.127.0.0.1/32 block is assigned for use as the Internet host loopback address. A datagram sent by a higher level protocol to an address anywhere within this block should loop back inside the host.

This is ordinarily implemented using only 127.0.0.1/32 for loopback, but no addresses within this block should ever appear on any network anywhere. Read the rest of this entry »

Frame relay configuration on router FWSW:

FRSW(config) # frame-relay switching

FRSW(config)#int s1/0

FRSW (config-if) # encapsulation frame-relay IETF
FRSW (config-if) # clock rate 2016000
FRSW(config-if)#frame-relay lmi-type cisco Read the rest of this entry »

1. Hardware Aspects

A server is simply a computer system with hardware and special characteristics which are those that distinguish it from the home systems, the hardware support is more accurate and more complex configurations that allow better performance eg settings can accommodate 128 Microprocessors latest technology and multiple terabytes of RAM without being exaggerated at all these capabilities.

Other characteristics in terms of hardware, apart from its impressive capabilities to offer spectacular returns is what is known as hardware type “hotswap” or “hot swap” that allow us to replace damaged components without the need if you want to turn off the system to carry out maintenance.

2. Software Aspects
Besides all that need special hardware obviously developed software to control the hardware, use 100% and of course maintaining maximum stability. Read the rest of this entry »

The IEEE 802.11 is a communications protocol that defines the use of the two lower layers of the OSI model (physical layer and data link), specifying its rules of operation for a wireless network (WLAN). The key technology that contains the 802.11 standard is the Direct Sequence Spread Spectrum (DSSS). The DSSS applies to wireless devices operating within the range of 1-2 Mbps. A DSSS system can transmit up to 11 Mbps, but if operating above 2 Mbps are considered not compliant.

Also called 802.11b Wi-Fi or wireless high-speed and refers to DSSS systems operating at 1, 2, 5.5 and 11 Mbps 802.11b. All systems comply with the rule retrospectively, and which are also compatible with 802.11 data transmission speeds of 1 and 2 Mbps DSSS only. This backward compatibility is very important as it allows for wireless network upgrade without replacing the NIC or access points. 802.11b devices achieve higher rates of data transfer rate and using an encoding technique other than that of 802.11, allowing the transfer of a greater amount of data in the same amount of time. Most 802.11b devices have not yet reached transfer rates of 11 Mbps, usually working in a range of 2-4 Mbps. Read the rest of this entry »