TYLOGIX Networking Page
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Tylogix CCNA Notes Tylogix CCNA Security Notes Tylogix CCNA Networking Definitions Tylogix latest page - IPv6 Tylogix's CCNA "What Were They Thinking"? Well-Known Port Map by Webopedia.com |
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OSI vs TCP |
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Layer |
Memory aid |
Typical Problems |
OSI Model |
Payload |
Data Type |
TCP/IP Model |
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7 |
Advice |
·
Application |
Application |
Data |
·
smtp ·
http ·
ftp ·
dns ·
etc... |
Application |
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6 |
People's |
Presentation |
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5 |
Sales |
Session |
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4 |
Trust |
·
QoS |
Transport |
Segment |
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tcp ·
Udp ·
rtp |
Transport |
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3 |
Not |
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Routing Protocols |
Network |
Packet |
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IP |
Internet |
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2 |
Do |
·
Excessive Broadcast ·
Encapsulation errors |
Data Link |
Frame |
·
HDLC (default) ·
Ethernet ·
Frame-Relay ·
PPP ·
ATM ·
WAN |
Network Interface |
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1 |
Please |
·
Collision Counts ·
Clock Rate ·
Jabber |
Physical |
Bits |
·
raw signal ·
WAN |
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Class |
From |
To |
n=network s=subnet (length may vary) h=hosts |
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Class A |
0.0.0.0 |
127.255.255.255 |
0nnnnnnn.ssssshhh.hhhhhhhh.hhhhhhhh |
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Class B |
128.0.0.0 |
191.255.255.255 |
10nnnnnn.nnnnnnnn. ssssshhh.hhhhhhhh |
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Class C |
192.0.0.0 |
223.255.255.255 |
110nnnnn.nnnnnnnn.nnnnnnnn. ssssshhh |
Cisco Prompts
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Mode |
Prompt |
What you can do |
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User Exec |
> |
ping show (limited) enable |
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Privileged Exec |
# |
erase startup-config reload debug |
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Global Configuration |
(config)# |
Hostname Enable secret Ip route |
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Interface Configuration |
(config-if)# |
Ip address Encapsulation Shut / no shut
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Router Configuration |
(config-router)# |
Network Version Auto-summary |
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Line Configuration |
(config-line)#
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Password Login |
