< All CompTIA Network+ Notes

darkprince | CompTIA Network+ | Module 1.3

By: Raul Pop | Related Course: CompTIA Network+ | Published: June 21, 2017 | Modified: June 24, 2017
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NotepadAPIPA

APIPA-Automatic Private IP Address

-169.254.x.x

-When DHCP is unavailable

 

Public vs Private

 

Class A

IP>10.0.0.0-10.255.255.255

sm>255.0.0.0(18)

 

Class B

IP>172.16.0.0-172.31.255.255

sm>255.240.0.0(112)

 

Class C

IP>192.168.0.0-192.168.255.255

SM>255.255.0.0(116)


NotepadCIDR

CIDR-Clasless Inter-Domain Routing

-Variable length subnet masks

-/16 vs 255.255.0.0

-/N is the Prefix

-255.255.0.0=/16

11111111.11111111.00000000.00000000

 

-?.?.?.?=/12

11111111.11110000.0000.0000

255.240.0.0

128 64 32 16 8 4 2 1

 


NotepadIP Address Classes

1)IP CClasases

-IP Address ”Network ID/Host ID ”

-Physical address(192.168.1.1)

-IPv4 are 32 bit address

-Devided into 4 octets

-0-255

 

2)Class A

-1.0.0.0-126.0.0.0

-255.0.0.0

 

3)Class B

-128.0.0.0-191.255.0.0

-255.255.0.0

 

4)Class C

-192.0.0.0-223.255.255.0

-255.255.255.0

 

5) Class D(Multicasting)

-224.0.0.0-239.0.0.0

 

 


NotepadMAC Address

MAC-Media Access COntrol

-Physical Address for NIC

-Unique worldwide

-Hexidecimal Format 6 pairs

-48 bits

Used in:

-DNS

-ARP

-DHCP

-Data Link Layer-Layer 2

-1-0

-A-F

 


NotepadSubnetting

Additional, networks to A/B/C

-Have a beginning/ENd

>First-Network ID(even)

>Last -Broadcast(odd)

-IP Address with subnet mask

-N =Furthest Left Subnet mask ”255”

-256-N=”Network Increment”

-First usable=Net ID-1

-Last usable=Next Net ID-2

 

 

Example:

192.168.0.x

255.255.255.0

 

 

192.168.1.37

255.255.255.240

 

N=240

Net ID=32

Broadcast=47

Usable Addresses=33-46

14 address

 


NotepadSubnetting part 2

Important Math

Number of subnets -2^ added bits

Number of Hosts – (2^off bit)-2

 

Throw it all together

 

Net Increment =256-N

Subnet=2^Added N

Hosts = (2^ off) -2

 

 

192.168.10.0/25

/25=11111111.11111111.11111111.10000000

/25=255.255.255.255.128

Extra Bits=1

Hosts Bits Off=7

Subnets 2^Added EB=2

Hosts 2^OFF-2=128-2=126

Increment=256-128=128

Net ID=192.168.10.0/192.168.10.128

Broadcast=192.168.10.127-192.168.10.255

Host ID


NotepadUnicast,Multicast,Broadcast

Multicast

-IPv4: Sending 1->Many

-IPv6 : 1->1 Many(Multicast groups,to replace broadcast)

 

Unicast :

-IPv4 1=>1

-IPv6 Link Local,Site Local,Unique Local,Global Unicast

 

Broadcast/Anycast:

IPv4:Broadcast to all in Broadcast Domain

IPv6: Anycast=>To nearest


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