gatways

An adapter attached to the analog phone

codec
codec standing for coder-decoder
coder convert analog to digital at sending side & digital 
to analog at recieving side.

ATA (Analog Telephone Adaptor)

gateways

Actually there is a getway called wap getway works like a
converter. it converts wsp request coming from ME to http to
access the internet.

Network operation center

Network operation center team

it is a point which is used to connect n/w elements

In computing, load balancing is a technique (usually
performed by load balancers) to spread work between many
computers, processes, disks or other resources in order to
get optimal resource utilization and decrease computing time.

Chassis, Is something where you have appropriate provision 
to hold the things. Eg Computer Cabinet.

Case: We can have different meanings in 
computer/it/telecom/general world.

Computer: Thing used to hold. Eg: CD Case.
IT: Particular event. Logging a event is a case.
Telecom: Different test cases. (Set of rules)

* Computer port (hardware), a physical interface between
a computer and other computers or devices
    * Computer port (software), a virtual data connection
between computer programs possibly through a computer network
    * TCP and UDP ports, numbers which are recognized by
Internet and other network protocols, enabling the computer
to interact with others
    * Porting, the process of re-writing software so as to
make it compatible with other operating system and/or
hardware architectures
    * Ports collection, part of the package management
infrastructure of modern BSD-derived operating systems

a gateway for data to be transmitted or received with in 
the the network.

It is a Uninturrupted power supply

uninterruptible power supply (UPS), uninterruptible power 
source or sometimes called a battery backup is a device 
which maintains a continuous supply of electric power to 
connected equipment by supplying power from a separate 
source when utility power is not available.

A PC assigned more than one IP Address is called Multi homed

In computer networking, the term Maximum Transmission Unit
(MTU) refers to the size (in bytes) of the largest packet
that a given layer of a communications protocol can pass
onwards. MTU parameters usually appear in association with a
communications interface (NIC, serial port, etc.). The MTU
may be fixed by standards (as is the case with Ethernet) or
decided at connect time (as is usually the case with
point-to-point serial links). A higher MTU brings higher
bandwidth efficiency. However large packets can block up a
slow interface for some time, increasing the lag on other
packets. For example a 1500 byte packet, the largest allowed
by Ethernet (and hence most of the Internet), would block up
a 14.4k modem for about one second.

The connection establishment process actually accomplishes
several things as it creates a connection suitable for data
exchange:
o	Contact and Communication: The client and server make
contact with each other and establish communication by
sending each other messages. The server usually doesn’t even
know what client it will be talking to before this point, so
it discovers this during connection establishment. 
o	Sequence Number Synchronization: Each device lets the
other know what initial sequence number it wants to use for
its first transmission. 
o	Parameter Exchange: Certain parameters that control the
operation of the TCP connection are exchanged by the two
devices.

CIDR notation looks like this:
X.X.X.X/24

The X.X.X.X represents the network number, and the /24 
desginates that the first 24 bits are the network portion 
of the address. Take 32 and subtract that number to find 
out how many bits are in the hosts portion.

Shorten the byte using ping command -l option