IPV6 uses a 128-bit address with 8 groups of 16 bits each. It does not support broadcast, NAT, or subnetting like IPv4. Communication types include unicast (one-to-one), multicast (one-to-many), and anycast (one-to-nearest). Special IP addresses include the loopback (::1), invalid (::), multicast (ff80::), link-local (fe80::), global unicast (2000::), and unique local (fc00::). WAN connections can be via dedicated lines, packet switching like Frame Relay, or protocols including HDLC, PPP, and Frame Relay which is configured between routers with DLCI, IP

1. IPV6
 128 bit hexadecimal address.
 Includes 8 group
 Each group of 16 bit
 Doesnot have the concept of broadcast
 Does not have the concept of NAT
 Does not have the concept of Subnetting
 Ex: fe80:167b:6400:0000:0000:0000:1bac:6701

2. Communication Types
 Unicast
One to One transmission
Types:-
1. Global Unicast- Public range
2. Unique local- Private range
3. Link local- APIPA
 Multicast
One to Many transmission
 Anycast
One to nearest transmission

3. Special IPs
 Loop back address- ::01 or ::1
 Invalid IP- 0000:0000:0000:0000:0000:0000:0000:0000 or ::
 Multi cast- ff80::
 Linklocal- fe80::
 Global unicast- 2000::
 Unique local- fc00::

4. WAN
 Wide area Networking
 Types:-
 Dedicated lines-
 High cost for implementation
 High security
 High speed of 45 mbps
 Circuit switching
 Pay according to usage
 Ex: dial up, ISDN
 Speed of 128 kbps
 Packet Switching
 A virtual communication line or path is established at the time of
communication only.
 Also known as Frame relay.
 Speed 64kbps- 45mbps

5. WAN Protocols
 HDLC
 High level data link control
 Used only for lease line
 HDLC is enabled by default.
 It has no user name and password
 PPP
 Used for ISDN only
 It has Authentication Code
 Router(config)#int serial 1/0
 Router(config-if)#encapsulation ppp

6. Frame Relay Configuration
 In Router A
Router(conf)#int f0/0
Router(conf-if)#ip address 172.16.0.1
Router(conf)#no shut
Router(conf)#int ser1/0
Router(conf)#encapsulation frame-relay
Router(conf)#frame-relay interface-dlci 100
Router(conf)# frame-relay lmi-type cisco
Router(conf-if)#ip address 40.0.0.1
Router(conf-if)#no shut

7.  In Router B
Router(conf)#int f0/0
Router(conf-if)#ip address 172.17.0.1
Router(conf)#no shut
Router(conf)#int ser1/0
Router(conf)#encapsulation frame-relay
Router(conf)#frame-relay interface-dlci 200
Router(conf)# frame-relay lmi-type cisco
Router(conf-if)#ip address 40.0.0.2
Router(conf-if)#no shut