Addressing Flashcards
Loopback Address
127.X.X.X
Reserved Addresses
240.X.X.X
All Class E
Cirtual IP Address (VIP)
Address assigned to internals of a device
Or VM
APIPA Address
169.254.X.X
Automatic Private IP Addressing
Also Link-Local
Only communicates with other local devices - no forwarding by routers
1st and last 256 addresses are reserved
Assigned via ARP
RFC1918
Sets Private Address Ranges
10.X.X.X 10.0.0.0/8
172.16.X.X - 172.31.X.X 172.16.0.0/12
192.168.X.X 192.168.0.0/16
Class A
255.0.0.0 mask
0-127
0xxx
Class B
255.255.0.0 mask
128-191
10xx
Class C
255.255.255.0 mask
192-223
110x
Class D
Multicast
224-239
1110
Class E
Reserved
240-255
1111
CIDR
Classless Inter-Domain Routing
255.0.0.0 = /8 number of bits in subnet mask
Binary to Decimal for Mask
00000000 = 0
10000000 = 128
11000000 = 192
11100000 = 224
11110000 = 240
11111000 = 248
11111100 = 252
11111110 = 254
11111111 = 255
VLSM
Variable Length Subnet Masks
Number of Subnets
2^(# of subnet bits)
Number of hosts per subnet
2^(host bits) - 2
IPv6 address length
128 bit
8 “octets”
IPv6 Address Compression
2601:04C3::4002:BE00:0000:0000:0000:0066
Group of zeros replaced by ::
- only one group
2601:04C3::4002:BE00::0066
Remove leading Zeros
2601:4C3::4002:BE00::66
Dual Stack
Devices that use both IPv4 and IPv6
Tunneling IPv6
Tunnel IPv6 and IPv4 network to combine
NAT64
Address translation between IPv6 and IPv4 addresses
Methods to handle compatibility issues between IPv6 and IPv4-only devices
Dual Stack
Tunneling
NAT64
CAM Table
Table in a switch containing device MAC addresses and other info
