japheth devries - hs comp i - network technologies

8/2/2019 Japheth DeVries - HS Comp I - Network Technologies

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Network

TechnologiesHigh School Computer



Ring Network

It is a closedCircle Every

Computer

communicates

On a Ring

Network eachcomputer takes

turns talking

If one comp fails all comps failIt’s completely inclosed



Bus NetworkT Connectors- Look like a T so you can plugyour cables together. Terminators- lines at theend and kills dead packets.

Bad because they are complex and collisions

cause slower speed.Good because the network doesn’t get

damaged



Star Network

Network is

slow becausemany

computers askfor bandwidth

Both cables and WAP’s work

for connections

Weakness is that

if the box goesdown the wholenetwork fails

Easiest network to set up



Tree (Hierarchy) Network

Expands the networkseach network has it’s own box that connects to the

main oneNetworks are underneath the main networkSingle point of exit and entry

Single point of communicationIf one computer fails the network falls apart

Virus’s can spread



Mesh Network

More reliable, has backups in case offailure in the network

No single point of failureMore expensive and Complex big blue

arrows go out to the WAN



Network Terms• Ring- Circular Network

• Bus- Connected by a single cable

• Star connected to single hub

• Tree network devices connected in hierarchy

• Mesh big mess of cable

• LAN Local area network

• WAN Wide area network

• Hub connection point for multiple devices

• Switch Hub with traffic lights regulates traffic

• Router Routes traffic to other network

• Hub and switch allow computers to communicate with each other

• Router allows networks to talk to each other



a einternet

• Today, DARPA’s mission is still to prevent technological surprise to

the US, but also to create technological surprise for its enemies.

• The Defense Advanced Research Projects Agency is an agency ofthe United States department of defense responsible for the

development of new technology for use by the military.

• It doesn’t have any one specific mission. But is for developing

technology mainly for the defense of the US or for military.



WAN

LAN



WAN

LAN

LAN



TCP/IP v.4Transmission Control Protocol/Internet Protocol

• IP Address : 32 bit binary string composed of four octets(192.168.10.50)

• Subnet: Network Identifier separates the network address from the device address

• Gateway: A computer or network that controls access to the WAN

• DNS: Domain Name Server Translates IP addresses to FQDN fully qualified domain name

• WINS windows internet name service translates IP addresses to computer name

• MAC address: Physical Address completely unique



Dotted Decimal59.9.32.5 each

is an octet

An octet is one bytethere are eight bits in a byteSplit into 4 octets

Four octets equals 32 bits

an IP address is a 32 binary number



Binary Octets

8 bits/Byte

Top Row: Number of bits in the octetMIDDLE ROW BIT ON OR OFF

bottom row bit value

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

128 64 32 16 8 4 2 1



65 11159 9

197 16 1139

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

12

864 32 16 8 4 2 1

Practice8 Bits/1 Byte 8 Bits/1 Byte 8 Bits/1 Byte8 Bits/1 Byte

8 Bits/1 Byte 8 Bits/1 Byte 8 Bits/1 Byte8 Bits/1 Byte

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

128

64 32 16 8 4 2 1

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

128

64 32 16 8 4 2 1

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

128

64 32 16 8 4 2 1

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

128

64 32 16 8 4 2 1

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

128

64 32 16 8 4 2 1

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

12

864 32 16 8 4 2 1

1 2 3 4 5 6 7 8

0 0 1 1 1 0 1 1

12

864 32 16 8 4 2 1

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