<Ul> <Li> IP <Ul> <Li> IPv4 </Li> <Li> IPv6 </Li> </Ul> </Li> <Li> ICMP </Li> <Li> IPsec </Li> <Li> IGMP </Li> <Li> IPX </Li> <Li> AppleTalk </Li> <Li> X. 25 PLP </Li> </Ul> <Li> IP <Ul> <Li> IPv4 </Li> <Li> IPv6 </Li> </Ul> </Li> <Ul> <Li> IPv4 </Li> <Li> IPv6 </Li> </Ul> <Li> X. 25 PLP </Li>

Two sub layers of osi data link layer are which of the following