L.A.N. LOCAL AREA NETWORKING
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TIER 1 early internet
Internet began via telephones at military base LANs during Cold War
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TCP/IPs
TCP/IPs go from 0 to 254 ...
= never beyond 254 and always w/3 dots mixed in (192.168.5.10)
**IP addy never ends with a lone ZERO or 255**
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IP ADDRESS: 192.168.5.10
was invented by ARPA to identify each military LAN
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IP ADDRESS: 192.168.5.10
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Your 4 cluster "octet":
A) Identifies what LAN you're part of
B) shows your unique host ID
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Class C IP ADDRESS = 210.11.12.?
your first 3 clusters of IP ADDRESS are set in stone. 4th cluster is unique
Class B IP ADDRESS = 210.11.?.?
First 2 clusters of IP ADDRESS set in stone. 3rd & 4th cluster unique
Class A IP ADDRESS = 210.?.?.?
First cluster of IP ADDRESS set in stone. 2nd, 3rd, & 4th cluster unique
Class C IP ADDRESS = only 254 hosts
Class B IP ADDRESS = 65,534 hosts
Class A IP ADDRESS = Millions of hosts
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**Internet ran out of class A, class B, & class C addresses at 4Billion combinations**
How did we fix this problem?? "NAT" fixed this
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IPv4 = built the internet
IPv6 = is what we use now!
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Updated DATA "FRAME" TRAIN now with IP ADDRESS:
Destination MACaddress + Source MACaddress + Destination IP + Source IP + DATA + FCS
**we can now escape to the internet**
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via GATEWAY aka Router
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SUBNET MASK
ex. = 255.255.255.0 for computers on LAN (Like a local call)
for your PC to get on the internet - it needs the following:
1. IP ADDRESS
2. .SUBNET MASK.
3. & DEFAULT GATEWAY within ROUTER
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NETWORK IDs + SUBNET MASKs
In Windows manually open "Network Sharing Center"
Then right click "Properties"
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How to configure a "static" IP ADDRESS?
**via admin - type it in manually**
IP ADDRESS + SUBNET MASK + DEFAULT GATEWAY
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