1. Appendix D

2. Functional Responsibilities
Written Exercise: OSI Model
OSI Model
PDU
Functional Responsibilities
Examples
Application
User Interface
Telnet, HTTP
ASCII, EBCDIC, JPEG
Presentation
Defines how data is presented
Keeping different applications’
data separate
Operating System/
Application Access
Scheduling
Session
Defines reliable or unreliable delivery
TCP, UDP
SPX
Transport
Segment
Provide logical addressing which routers use for path determination
Network
IP, IPX
Packet
Combines bits into bytes and bytes into frames, offers access to media using MAC address and performs error detection not correction
802.3 / 802.2
HDLC
Data Link
Frame
Specifies voltage, wire speed and pin-out cables and moves bits between devices
TIA/EIA-232 V.35
Physical
Bits

3. IP Address Classes Exercise Answers
Network
Host A B
(17 of 17 layers) C C B
Nonexistent

4. Subnet Mask Exercise Answers
Address
Subnet Mask
Class
Subnet B A
(Seven of seven layers) A

5. Broadcast Addresses Exercise Answers
Subnet Mask
Class
Subnet
Broadcast C A
(13 of 13 layers) B B

6. Written Exercise: Answers
S/T
NT1 U
BRI 0 U R TA
S/T
NT1
S 0
Customer Premises
Local Loop
Service Provider
Label the functional elements and reference points

7. Written Exercise: IPX Parameter Planning
R3 Interface Name
Network Address
Encapsulation S0
d100
hdlc S1
c0b0
hdlc E1
b1b0
novell-ether
Network c0b0 S1
S0 hdlc
Slide 7 of 7
Purpose:
Emphasize: R2 R3 S0
Network b001
S1 hdlc E1
Network b1b0
Network d100 E1
E0 SAP
E0 novell-ether R1 R4
Write the IPX addresses and encapsulation types for R3

8. Blank for pagination