Networks
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Prologic Recruitment Ltd Training Division
A+ Part I Computer Hardware
NETWORKS
Mathew Abraham Prologic Recruitment Ltd.
1
Networks OSI Model Topologies - Ethernet - Token-Ring Networking Equipments General Trouble shooting
Prologic Recruitment Ltd.
2
OSI – Open System Interconnect
7. 6. 5. 4. 3. 2.
Developed by ISO & IEEE Application layer – communicates wit applications Presentation layer - translates, de/compress, de/encrypt Sessions layer - Establishes Connections Transport layer - Error Correction Network layer – Routing, Finding Best Route Data link layer – disassembles & assembles Data segments
1. Physical layer – Passes Data onto wire All People Seem To Need Data Processing Please Do Not Throw Pizza Sausage Away
Prologic Recruitment Ltd.
3
OSI
Acknowledgement
Prologic Recruitment Ltd.
4
Network Topologies Two or more computers connected by some mechanism to share information Ethernet - Bus - Star Token-Ring - Ring Topology - Physical layout of the network
Prologic Recruitment Ltd.
5
Ethernet Bus- Thin net
Prologic Recruitment Ltd.
6
Thin net
Prologic Recruitment Ltd.
7
BNC – British Naval Connector
Prologic Recruitment Ltd.
8
Ethernet – Thick net
Auxiliary Unit Interface Prologic Recruitment Ltd.
9
Vampire Tap
AUI Prologic Recruitment Ltd.
10
Ethernet - Star
Pros – Utilizes a Hub - Easy to configure/expand - Easier to trouble shoot - If one pc fails only that pc is affected. Cons - Needs More Cabling - Central Point of failure Prologic Recruitment Ltd.
11
Hub
Prologic Recruitment Ltd.
12
Hub – How It looks?
Prologic Recruitment Ltd.
13
STAR
Cat 5 cable, RJ45 Connector 100M max cable length 10 base T (twisted pair)
- UTP – unshielded - STP – Shielded 100 base T
Prologic Recruitment Ltd.
14
Cat 5 cable, RJ45 Connector
Prologic Recruitment Ltd.
15
NIC
activity
Prologic Recruitment Ltd.
10
100
16
Optical Fiber
(electro magnetic Interference)
Prologic Recruitment Ltd.
17
HOW DATA IS PLACED ON WIRE
CSMA/CD – carrier sense multiple access with collision detection
Every one listens Anyone can access if wire is free Detects Collision
Prologic Recruitment Ltd.
18
Token - Ring
IBM Token passing access method. Logical Ring/Physical Star. Connects via a MSAU (multi station access unit)
Prologic Recruitment Ltd.
19
Token Ring
Prologic Recruitment Ltd.
20
How it works?
Prologic Recruitment Ltd.
21
Passing Token
Prologic Recruitment Ltd.
22
Token ring
Prologic Recruitment Ltd.
23
FDDI- Fiber Data Distributed Interface
Prologic Recruitment Ltd.
24
FDDI - Advantages
Prologic Recruitment Ltd.
25
Network Connectivity
Repeater Hub Bridge Switch Router Gateway
Prologic Recruitment Ltd.
26
Repeater
Prologic Recruitment Ltd.
27
Hub
Prologic Recruitment Ltd.
28
BRIDEGE
MAC (Media Access Control) 48 bit number burnt into Network Adaptor Card FILTERING
Prologic Recruitment Ltd.
29
Bridge
Prologic Recruitment Ltd.
30
Bridging Table Bridging Table
Prologic Recruitment Ltd.
31
SWITCH
MAC Address Table
switch HUB
HUB HUB
Prologic Recruitment Ltd.
32
Router If information is not local it is sent to default Gateway
Prologic Recruitment Ltd.
33
Setting IP address
Prologic Recruitment Ltd.
34
OSI and devices
Application layer – Gateway Presentation layer – Gateway Sessions layer - Gateway Transport layer – Gateway Network layer – Router Data Link Layer - Bridge, Switch Physical layer – Repeater, Hubs
Prologic Recruitment Ltd.
35
General Trouble Shooting PING = packet internet work grouper
Prologic Recruitment Ltd.
36
Trouble shooting Bus Network
Time Domain Reflector
Prologic Recruitment Ltd.
37
A+ Part I Computer Hardware
NETWORKS
Mathew Abraham Prologic Recruitment Ltd.
1
Networks OSI Model Topologies - Ethernet - Token-Ring Networking Equipments General Trouble shooting
Prologic Recruitment Ltd.
2
OSI – Open System Interconnect
7. 6. 5. 4. 3. 2.
Developed by ISO & IEEE Application layer – communicates wit applications Presentation layer - translates, de/compress, de/encrypt Sessions layer - Establishes Connections Transport layer - Error Correction Network layer – Routing, Finding Best Route Data link layer – disassembles & assembles Data segments
1. Physical layer – Passes Data onto wire All People Seem To Need Data Processing Please Do Not Throw Pizza Sausage Away
Prologic Recruitment Ltd.
3
OSI
Acknowledgement
Prologic Recruitment Ltd.
4
Network Topologies Two or more computers connected by some mechanism to share information Ethernet - Bus - Star Token-Ring - Ring Topology - Physical layout of the network
Prologic Recruitment Ltd.
5
Ethernet Bus- Thin net
Prologic Recruitment Ltd.
6
Thin net
Prologic Recruitment Ltd.
7
BNC – British Naval Connector
Prologic Recruitment Ltd.
8
Ethernet – Thick net
Auxiliary Unit Interface Prologic Recruitment Ltd.
9
Vampire Tap
AUI Prologic Recruitment Ltd.
10
Ethernet - Star
Pros – Utilizes a Hub - Easy to configure/expand - Easier to trouble shoot - If one pc fails only that pc is affected. Cons - Needs More Cabling - Central Point of failure Prologic Recruitment Ltd.
11
Hub
Prologic Recruitment Ltd.
12
Hub – How It looks?
Prologic Recruitment Ltd.
13
STAR
Cat 5 cable, RJ45 Connector 100M max cable length 10 base T (twisted pair)
- UTP – unshielded - STP – Shielded 100 base T
Prologic Recruitment Ltd.
14
Cat 5 cable, RJ45 Connector
Prologic Recruitment Ltd.
15
NIC
activity
Prologic Recruitment Ltd.
10
100
16
Optical Fiber
(electro magnetic Interference)
Prologic Recruitment Ltd.
17
HOW DATA IS PLACED ON WIRE
CSMA/CD – carrier sense multiple access with collision detection
Every one listens Anyone can access if wire is free Detects Collision
Prologic Recruitment Ltd.
18
Token - Ring
IBM Token passing access method. Logical Ring/Physical Star. Connects via a MSAU (multi station access unit)
Prologic Recruitment Ltd.
19
Token Ring
Prologic Recruitment Ltd.
20
How it works?
Prologic Recruitment Ltd.
21
Passing Token
Prologic Recruitment Ltd.
22
Token ring
Prologic Recruitment Ltd.
23
FDDI- Fiber Data Distributed Interface
Prologic Recruitment Ltd.
24
FDDI - Advantages
Prologic Recruitment Ltd.
25
Network Connectivity
Repeater Hub Bridge Switch Router Gateway
Prologic Recruitment Ltd.
26
Repeater
Prologic Recruitment Ltd.
27
Hub
Prologic Recruitment Ltd.
28
BRIDEGE
MAC (Media Access Control) 48 bit number burnt into Network Adaptor Card FILTERING
Prologic Recruitment Ltd.
29
Bridge
Prologic Recruitment Ltd.
30
Bridging Table Bridging Table
Prologic Recruitment Ltd.
31
SWITCH
MAC Address Table
switch HUB
HUB HUB
Prologic Recruitment Ltd.
32
Router If information is not local it is sent to default Gateway
Prologic Recruitment Ltd.
33
Setting IP address
Prologic Recruitment Ltd.
34
OSI and devices
Application layer – Gateway Presentation layer – Gateway Sessions layer - Gateway Transport layer – Gateway Network layer – Router Data Link Layer - Bridge, Switch Physical layer – Repeater, Hubs
Prologic Recruitment Ltd.
35
General Trouble Shooting PING = packet internet work grouper
Prologic Recruitment Ltd.
36
Trouble shooting Bus Network
Time Domain Reflector
Prologic Recruitment Ltd.
37
