WANDefinition of terms

Wide Area NetworkDifference of LAN to WAN

Who uses WAN?How WAN works?

Advantages and Disadvantages of WAN

Definition of Terms

• Internet- is a global system of _____________ computer networks that use the standard Internet protocol suite (TCP- Transmission Control _______ / IP- _______ Protocol) to serve several billion users worldwide.

interconnected

ProtocolInternet

• Ethernet- is a LAN technology that can be used with almost any kind of computer and that describes how data can be sent in _______ in between computers and other networked devices usually in close proximity.

• Token Ring - an example of a ring network of IBM in which a bit pattern determines which user on the network can _____ information.

packets

send

• MPLS- Label Switching. It is a mechanism in high-performance telecommunications networks that _____ data from one network node to the next based on short path labels rather than long network addresses, avoiding complex lookups in a routing table.

• ATM- Transfer Mode

Multiprotocol

directs

Asynchronous

• Frame Relay- is a standardized wide area network  ________ that specifies the physical and logical link layers of digital telecommunications channels using a packet switching methodology. 

technology

•X.25- consists of packet-switching exchange (PSE) _____ as the networking hardware, and leased lines, plain old telephone service connections or Integrated Services Digital Network (ISDN) connections as physical links. It is a family of _______ that was popular during the 1980s with telecommunications companies and in financial transaction systems such as automated teller machines. 

nodes

protocols

• Hubs- is a device for connecting multiple  devices together and making them act as a single network segment.

• Repeaters- is an electronic device that receives a signal and   it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances.

Ethernet

retransmits

• Routers- is a device that forwards data packets between computer networks, creating an overlay  .

• VPN- Virtual Network. It enables a computer to send and receive data across shared or public networks as if it was directly connected to the private network, while benefitting from the functionality, security and management policies of the private network.

internetwork

Private

• Bandwith-  is a measurement of   of available or consumed data communication resources expressed in bits per second or multiples of it (bit/s, kbit/s, Mbit/s, Gbit/s, etc.).

Bit-rate

WIDE AREA NETWORK

• A wide area (WAN) is a communications network that covers a wide _________ area, such as a country or the world (ex. most long-distance and regional telephone companies) unlike other networks that only covers a room, building or a city.

network

geographic

• WANs are used to local area networks together, so that users and computers in one location can ___________ with users and computers in other locations.

• A WAN may be privately owned or rented, but the term usually connoted the inclusion of (shared-user) networks.

• The best example of a WAN is the _______.

connect

communicate

public

internet

Difference of LAN to WAN

LAN WAN

Definition: LAN (Local Area Network) is acomputer network covering asmall geographic area, like a home, office, schools, or _____ of buildings.

WAN (Wide Area Network) is a computer network that covers a _____ area (e.g., any network whose communications _____ cross metropolitan, regional, or national boundaries over a long distance

group

broad

links

LAN WANSpeed: high

speed(1000mbps)less speed(150mbps)

Data transfer rates:

LANs have a ____ data transfer rate

WANs have a lower data transfer rate as compared to ____

Example: Network in an ____________ can be a LAN

_______ is a good example of a WAN

high

LANs

organizationInternet

LAN WANTechnology: Tend to use

certain connectivity technologies, primarily _______and ____ Ring

WANs tend to use technology like _____, ____, _____ Relay and ____ for connectivity over the longer distances

EthernetToken

MPLS ATMFrameX.25

LAN WANConnection: one LAN can be

connected to other LANs over any distance via _________ lines and radio waves

Computers connected to a wide-area network are often connected through public networks, such as the telephone system. They can also be connected through leased lines or _______

telephone

satellites

LAN WANComponents: layer 2 devices

like switches, bridges. layer1 devices like ____, _________

Layers 3 devices ______, __________ Switches and Technology specific devices like ATM or Frame-relay Switches etc.

hubsrepeaters

routersMulti-layer

LAN WANFault Tolerance:

LANs tend to have _____ problems associated with them, as there are a smaller amount of systems to deal with.

WANs tend to be less fault tolerant as it consists of a large amount of _______ there is a lower amount of fault tolerance.

Data Transmission Error:

Experiences fewer data ___________  errors

Experiences more ____ transmission errors as compared to LAN

fewer

systems

transmissiondata

LAN WANOwnership: Typically

owned, controlled, and _________ by a single person or organization

WANs (like the Internet) are not owned by any one organization but rather exist under ________ or distributed ownership and management over long distances

managed

collective

LAN WANSet-up costs: If there is a

need to set-up a couple of extra _______ on the network, it is not very expensive to do that

In this case since networks in remote areas have to be connected hence the set-up costs are higher. However WANs using public networks can be setup very cheaply, just _________ (VPN etc)

devices

software

LAN WANGeographical Spread:

Have a small __________ range and do not need any leased telecommunicati-on lines

Have a large geographical range generally ________ across boundaries and need leased telecommunicati-on lines

geographical

spreading

LAN WANMaintenance costs:

Because it covers a relatively small geographical area, LAN is easier to ________ at relatively low costs.

Maintaining WAN is difficult because of its ______ geographical coverage and higher maintenance costs.

Bandwidth: High _________ is available for transmission.

___ bandwidth is available for transmission

Geographical Area:

Lan covers 100 m Wan covers more than 100 m

maintainwider

bandwith low

Who uses WAN?

WAN are usually used by public ______ networks, large ________ networks, ______ networks, ________ networks, stock _________ networks, and ______ reservation networks.

packetcorporate

military bankingbrokerage airline

How WAN works?

Advantages of WAN

• Covers a large geographical area so long distance _________ can connect on the one network

• software and resources with _________ workstations

• Messages can be very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called ).

businesses

Sharesconnecting

sent

attachments

• Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different for each computer.

• Everyone on the network can use the

data. This avoids problems where some users may have older information than others.

• Share information/files over a larger ____ • network cover

peripheral

same

area

Large

• Are and generally ____• Need a good to restrict outsiders

from entering and the network• Setting up a network can be an expensive

and complicated . The bigger the network the more expensive it is.

Disadvantages of WAN

expensive slow

firewalldisrupting

experience

• Security is a real issue when many different people have the ability to use information from other computers. Protection against ______ and adds more complexity and expense.

• Once set up, maintaining a network is a ______ job which requires network supervisors and technicians to be employed.

hackers viruses

full-time

• Information may not meet local or interests

• to hackers or other outside threats 

needs

Vulnerable

Thank you for listening!!

Johny A. PrudencioIII-BLIS