Wide Area Networking
What is a wide area
A wide area network is a computer network in
which the computers connected may be far apart generally having a radius of
more than 1 kilometer, hence the name ‘wide area’. A wide area network consists
of multiple Local Area Networks working together simultaneously.
What is ADSL?
ADSL stands for Asymmetric Digital Subscriber
Line service. It is called asymmetric because the download and
upload speeds are not symmetrical (download speed is faster than upload speed).
ADSL is one particular type of DSL broadband communications technology used for
connecting to the internet.
What role does a
Desktop Computer vs a Laptop play in a wide area network?
In a Wide area network a desktop computer generally will
connect to its local area network through an Ethernet cable connecting from the
PC to the Switch located on the Wireless Router. The difference between a
Desktop and a Laptop in a WAN is that Desktops usually will have better specs
e.g. Faster CPU, more RAM and more storage and therefore these specs give the
Desktop the ability to host a local server and within its local area network.
Desktops are generally used for applications that require more computing power.
Although a Laptop may not have as good of specs as the same priced Desktop will
have it has the ability to be portable and it can join the Local Area network
through a wireless WIFI connection in multiple locations.
The Router vs a switch
in a wide area network?
A router is a device that transports data along networks. It
is connected to the internet service provider’s network and the local area
network. Routers are the gateway to the Wide Area Network and routers are the
intersection point where two networks meet/connect. Routers use protocols to
communicate between other routers to send digital information. A switch is a
device commonly found in home routers that filters and distributes digital
information between multiple devices by using the devices unique MAC address to
determine where the digital information is heading. A MAC address is a hardware
address automatically assigned to the device when it is made. An IP address is
a software address that is given to the device from the router.
What a modem does?
A modem works as a modulator and a demodulator it is
responsible for converting Digital information into analog information and back
the other way. Between the LAN and the WAN without a modem the network will
only be local and will have no connection to the ‘Internet’ (cloud).
Network-Attached Storage is a type of multimedia file
storing device that provides the local area network with a file based shared
storage system between an Ethernet connection. NAS devices are configured and
managed with a browser-based programme. Each NAS relies on the local area
network as its network and each NAS has its own MAC and IP address.
Google Drive is a multimedia file storage service
created by Google. It allows users to store files in the cloud, share
files, and edit documents. Google drive acts as a virtual hard drive which is
globally stored in the Cloud it can be accessed anywhere on a WAN at any time.
Connection and wireless compared
A wired network consists of using cables to connect
devices to the Internet or other networks. Commonly wired networks use
cables connected to Ethernet ports on the internet router on one end
and to a computer or other device on the cable’s other side. A wired network
uses Ethernet cable’s as a method of conducting information back and forth from
the device to the router. Wired home networks are less expensive,
higher speed, and more secure than wireless networks. However a wired
connection also has its biggest disadvantage as there is little or no
portability. Disadvantages of a Wireless Network are that they
require extra costs and equipment to set up. The general speed, both upload and
download, of a wireless connection is also usually much slower than
a wired one. And privacy and security is a lot less secure than that of an
equivalent wired connection.
CAT 5 vs CAT 6 cables
Fibre optics means sending light beams down thin strands of
plastic or glass by making them bounce repeatedly off the walls. Light travelling
down the fibre optic cable bounces repeatedly off the walls. Each tiny photon (microscopic
particle of light) bounces down the pipe in a particular unique order.
The beam of light will never leak out of the edges. Because we know light
behaves as both a wave and a particle and when light hits glass at a really
shallow angle (less than 42 degrees), it reflects back in again as though
the glass acts as a mirror. This concept is
internal reflection and is why the light doesn’t escape the pipe. The
other aspect that keeps light in the pipe is the construction of the
cable, which is made up of two separate parts. The main part of the
cable that the light passes through is called the core. On the exterior of the
is another layer of glass called the cladding. The cladding part of the
pipe is used to keep the light signals inside the core. It can do this because
it is made of a different type of glass than that of the core. Fibre
optics relates to a Wide area network as it conducts information from a device
to the switch and vice versa in a particular local area network. Multiple LAN
using Fibre Optics internet connections work together in a WAN.
What Is Ethernet?
Ethernet is a type
of connection between computers that forms the basis of most Local Area Networks
(LAN). It is commonly one of the main methods for connecting a computer or
network to the Internet. Ethernet cables commonly connect to a central hub or
router in order to manage several computers simultaneously connected. To avoid
collisions between multiple computers conducting information at the same time a
Carrier-sense multiple access with collision detection is used. This is a media
access control method used in Ethernet technology for both local area
networking and wide area networking.
What is DHCP?
Configuration Protocol (DHCP) is a client/server protocol software built into
the hardware of your device that automatically provides an Internet Protocol
(IP) host with its IP address and other related configuration
information. Without an IP address devices won’t be connected to either a local
area network or a wide area network.
Local Area Networks or LANs, and Wide Area Networks or WANs,
can both be defined by the network protocols that determine them. Protocols are
standards that define how data is ultimately transferred from one system to
another an agreed set of rules or in some cases an agreed procedure.
Packet switching is a style networking in which small packets
of data called packets are sent
through a network determined by the unique destination address contained within
each packet. The concept of communicating in small packets rather than large
amounts of data is a lot more efficient in terms of speed. This type of
communication between sender and receiver is known as connectionless.
A common example of
a circuit switching is the early analog telephone network. When a call is made from
one telephone to another switches within the telephone exchanges automatically generate a continuous wire circuit
between the two telephones for as long as the call lasts. Circuit switching is
the opposite of packet switching which in contrast
splits the transmitted data into tiny packets transmitted
through the network independently. The difference is in packet switching
instead of being dedicated to one communication session at a time, the packets
of data that are sent are shared from multiple competing communication sessions
this means the quality of the service decreases unlike that in a circuit