...LAN and WAN technologies? 1) network access layer 2)internet layer 3)transport layer 4)application layer

huh? are u azn?

there is no TCP/IP model layer.....what there is though is an OSI 7-layer model and TCP is considered layer 4 while IP resides on the third layer.

I echo what Yo said. You are thinking of the OSI model which is seven layers. There is no TCP/IP model layer. His comments are 100% correct.

sorry the spacing didn't work right...it would be layer 2 - the Internet layerTCP/IP OSI4: application 7: application4: 6: presentation4: 5: session 3: transport 4: transport2: Internet 3: network1: 2: data1: network access layer 1: physical

seven-layer OSI reference model versus the four TCP/IP protocollayers The four TCP/IP layers are as follows: Link. : The TCP/IP protocol suite includes rudimentary link layer protocols, such as the Serial Line Internet Protocol (SLIP) and the Point-to-Point Protocol (PPP). However, TCP/IP does not include physical layer specifications or complex local area network (LAN) protocols such as Ethernet and Token Ring. Therefore, although TCP/IP does maintain a layer that is comparable to the OSI data-link layer, in most cases the protocol operating at that layer is not part of the TCP/IP suite. TCP/IP does, however, include ARP, which can be said to function at least partially at the link layer, because it provides services to the internet layer above it. Internet. : The internet layer is exactly equivalent to the network layer of the OSI model. IP is the primary protocol operating at this layer, and it provides data encapsulation, routing, addressing, and fragmentation services to the protocols at the transport layer above it. Two additional protocols, called the Internet Control Message Protocol (ICMP) and the Internet Group Message Protocol (IGMP), also operate at this layer, as do some of the specialized dynamic routing protocols.Transport. : The transport layer is equivalent to the layer of the same name in the OSI model. The TCP/IP suite includes two protocols at this layer, the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP), which provide connection-oriented and connectionless data transfer services, respectively. Application. : The TCP/IP protocols at the application layer can take several different forms. Some protocols, such as the File Transfer Protocol (FTP), can be applications in themselves, whereas others, such as Hypertext Transfer Protocol (HTTP), provide services to applications. The following sections examine some of the protocols that operate at the various layers of the TCP/IP protocol stack. Now you can determine that which layer LAN & WAN works.I think it is working in Link Layer

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IP layer and above.