Networking Essentials Chapter 7 Fall, 2012
Like a telephone number ◦ (708) ◦
Class A ◦ First octet digit is _________ ◦ In binary, first digit is ____ ◦ N.H.H.H N = _______________ H = _______________
Class B ◦ First octet digit is _________ ◦ In binary, first digit is ____ ◦ N.N.H.H N = _______________ H = _______________
Class C ◦ First octet digit is _________ ◦ In binary, first digit is ____ ◦ N.N.N.H N = _______________ H = _______________
Class D ◦ First octet digit is _________ ◦ Used for ________________ Class E ◦ First octet digit is _________ ◦ Used for ________________
Class A private IP addresses ◦ Range = ___. ___. ___. ___ - ___. ___. ___. ___ Class B private IP addresses ◦ Range = ___. ___. ___. ___ - ___. ___. ___. ___ Class C private IP addresses ◦ Range = ___. ___. ___. ___ - ___. ___. ___. ___
How does NAT work? How does APIPA work? APIPA addresses = ___. ___. ___. ___
Broadcast … Multicast … Unicast …
IPv4 ◦ 4.3 million possible addresses ◦ 32 bits ◦ no integrated security (relies on other layers) IPv6 ◦ 3.4 gazillion (3.4 x ) possible addresses ◦ 128 bits ◦ integrated IPSec ◦ header is smaller (contains fewer fields) so it’s faster ◦ multiple IP addresses may be assigned to same host Channel bonding, anyone?
2001:0db8:3c4d:0012:0000:0000:1234:56ab _______________ _____ _____________________ Hexadecimal! Eight “blocks” Colons instead of “dots” Browser (notice brackets): http: //[2001:0db8:3c4d:0012:0000:0000:1234:56ab]/index.html (thank goodness for _________!)
2001:0db8:3c4d:0012:0000:0000:1234:56ab aka 2001:db8:3c4d:12:0:0:1234:56ab aka 2001:db8:3c4d:12::1234:56ab
0:0:0:0:0:0:0:0 (aka ::) - equal to 0:0:0:0:0:0:0:1 – loopback ( ) 0:0:0:0:0:0: – existing IPv4 addy 2000::/3 – global unicast address range FC00::/7 – unique local unicast range FE80::/10 – link-local unicast range FF00::/8 – multicast range 3FFF:FFFF::/32 – reserved for examples and doc. 2001:0DB8::/32 – also reserved for same 2002::/16 – 6to4 (transition system- see p. 230)