Chapter 13 -

dingdongboomNetworking and Communications

Oct 27, 2013 (4 years and 8 months ago)


Chapter Thirteen

The Other Protocols


You’ll get a brief overview of




How each protocol handles addressing

The pros and cons of each protocol


Internetwork Packet Exchange/Sequenced
Packet Exchange

Developed by Xerox in the early 80s

Adopted and tweaked by Novell to become their
protocol of choice in NetWare

Addressing in IPX/SPX

bit network address

MAC address of interface becomes host address

A socket number assigned to the process or
application running on the device

This is NOT the same as the sockets discussed in the
Transport layer.

The station address

The combined network/host address

Configuring IPX/SPX

If no network number is statically assigned, the
host will send out a broadcast looking for a SAP

The SAP server will assign an address.

Correct frame type is necessary in IPX.

Auto Detect usually works pretty well.

Frame Types

802.3 (Raw)

The typical Ethernet frame


An older frame type used by non

Ethernet II

Ethernet SNAP

Routing in IPS/SPX

If a packet isn’t addressed to the local network,
the transmitting station will broadcast a RIP

Available routers with access to the target
network number respond with their node
address and the number of hops to target.

Transmitting workstation picks the router with
the fewest hops and transmits the packet.

Pros and Cons of IPS


Light overhead on the individual workstations

Very easy to configure and hard to mess up


Very HEAVY overhead on the network as a

A limited number of hops prevents extremely
large networks (like the Internet)


NetBIOS Enhanced User Interface

Developed by Microsoft for early versions of NT

A Layer 2 protocol

No longer supported by Microsoft

XP does not install NetBEUI by default, but the
protocol can be added from the installation CD.

Pros and Cons of NetBEUI


Easy to configure

All you need is to put all workstations on the same
workgroup, but make sure they have different names.

Extremely fast with low overhead on network
and workstations


Not routable


Developed by Apple Computer Corporation

Has a lot of similarities to TCP/IP

Layered functionality

A robust collection of related protocols

Moves data in datagrams

Addressing in AppleTalk

Each host is assigned a node ID and an entity

The Node ID is similar to the IP address.

The entity name is similar to a NetBIOS name.

Networks are numbered (like in IPX/SPX) with
bit network numbers.

The Name Binding Protocol (NBP) resolves
node IDs and entity names to MAC addresses.

Some AppleTalk Protocols
(1 of 2)

Datagram Delivery Protocol (DDP) provides point
point delivery of user data.

Routing Table Maintenance Protocol (RTMP) allows
routers to dynamically build routing tables.

AppleTalk Echo Protocol (AEP) is Apple’s version of

AppleTalk Transaction Protocol provides connection
oriented data delivery services.

Some AppleTalk Protocols
(2 of 2)

AppleTalk Data Streaming Protocol (ADSP)
provides jitter
free delivery of multimedia.

AppleTalk Session Protocol (ASP) opens,
maintains, and closes sessions.