CCNA (Lecture1).ppt.ICND1CCENT/CCNA ICND1

ccna slides for students.CCENT/CCNA ICND1.CCENT/CCNA ICND1CCENT/CCNA ICND1

1. CCNA
Lecture 1
1

2. Network Essential

What is Network
connection of one or more electronic devices

Types of Network
LAN
e.g., college or office network
MAN
connecting different campuses
WAN
Geographically different locations
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3. Topologies
Physical way of connecting devices onto the network
Common Physical Topologies
Bus Topology
Nodes directly connected to a common link
Star Topology
Central point responsible for packet transmission
Ring Topology
Mesh Networks e.g., internet
Partial Mesh Networks
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4. Router (Motherboard)

Internal Structure of Router
Power Supply
Flash SIMM
Memory slot
Boot ROM
extracts information at Boot time
RAM DIMMs
RAM modules
CPU
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5. Cisco 2600 Router

Interfaces
Serial Ports
For WAN connectivity
Fast Ethernet Ports
Console Port
Auxiliary Port
Connected with modem
Power Switch
Power Card Connection
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6. Console Connectivity

Computer

Rollover Cable

Console Port

Rollover cable directly connected to console port

RJ-45 Connector

4 pairs, 8 cables

RJ-45 to DB-9 Adapter
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7. Cable Types
(100 Base T) Cat 5 and Cat 5 E
100 Mbps
Baseband
Attenuation length
Cat 5 (100 Mbps)
Cat 5 E (1Gbps)
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8. Cable Types..
Twisted Pair Cable
(100 Base T) Cat 5 and Cat 5 E
Straight through
For two dissimilar devices
Cross Over
For communication b/w similar devices
Rollover
For console connectivity
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