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Tylogix CCNA Notes

Tylogix Network Protocols
Switch, LAN, WAN protocols (Work in Progress)

Tylogix CCNA Security Notes
Switch, LAN, WAN protocols (Work in Progress)

Tylogix CCNA Networking Definitions
Networking Definitions (Work in Progress)

Tylogix latest page - IPv6
Networking Definitions (Work in Progress)

Tylogix's CCNA "What Were They Thinking"?
The aim of this page is to simply ask: What was Cisco thinking?

Well-Known Port Map by Webopedia.com

 

 

 

 

OSI vs TCP

Layer

Memory aid

Typical Problems

OSI Model

Payload

Data Type

TCP/IP Model

7

Advice

    Application

Application

Data

    smtp

    http

    ftp

    dns

    etc...

Application

6

People's

Presentation

5

Sales

Session

4

Trust

    QoS

Transport

Segment

    tcp

    Udp

    rtp

Transport

3

Not

    Routing Protocols

Network

Packet

    IP

Internet

2

Do

    Excessive Broadcast

    Encapsulation errors

Data Link

Frame

    HDLC (default)

    Ethernet

    Frame-Relay

    PPP

    ATM

    WAN

Network Interface

1

Please

    Collision Counts

    Clock Rate

    Jabber

Physical

Bits

    raw signal

    WAN

 

Class

From

To

n=network s=subnet (length may vary) h=hosts

Class A

0.0.0.0

127.255.255.255

0nnnnnnn.ssssshhh.hhhhhhhh.hhhhhhhh

Class B

128.0.0.0

191.255.255.255

10nnnnnn.nnnnnnnn. ssssshhh.hhhhhhhh

Class C

192.0.0.0

223.255.255.255

110nnnnn.nnnnnnnn.nnnnnnnn. ssssshhh

Cisco Prompts

Mode

Prompt

What you can do

User Exec

> 

ping

show (limited)

enable

Privileged Exec

#

erase startup-config

reload

debug

Global Configuration

(config)#

Hostname

Enable secret

Ip route

Interface Configuration

(config-if)#

Ip address

Encapsulation

Shut / no shut

Router Configuration

(config-router)#

Network

Version

Auto-summary

Line Configuration

(config-line)#

Password

Login

http://www.cisco.com/images/IOSTREE.gif