1. © 2000, Cisco Systems, Inc. D-1 Appendix D

2. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-2 Application Presentation Session Transport Network Data Link Physical OSI Model PDU Functional Responsibilities Examples Written Exercise: OSI Model Segment Packet Frame Bits Keeping different applications’ data separate User Interface Defines how data is presented Defines reliable or unreliable delivery Provide logical addressing which routers use for path determination Combines bits into bytes and bytes into frames, offers access to media using MAC address and performs error detection not correction Specifies voltage, wire speed and pin-out cables and moves bits between devices TCP, UDP SPX 802.3 / 802.2 HDLC TIA/EIA-232 V.35 IP, IPX Telnet, HTTP ASCII, EBCDIC, JPEG Operating System/ Application Access Scheduling

3. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-3 IP Address Classes Exercise Answers Address ClassNetworkHost 10.2.1.1 128.63.2.100 201.222.5.64 192.6.141.2 130.113.64.16 256.241.201.10 A B C C B Nonexistent 10.0.0.0 128.63.0.0 201.222.5.0 192.6.141.0 130.113.0.0 0.2.1.1 0.0.2.100 0.0.0.64 0.0.0.2 0.0.64.16

4. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-4 Subnet Mask Exercise Answers AddressSubnet MaskClassSubnet 172.16.2.10 10.6.24.20 10.30.36.12 255.255.255.0 255.255.240.0 255.255.255.0 B A A 172.16.2.0 10.6.16.0 10.30.36.0

5. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-5 Broadcast Addresses Exercise Answers 153.50.6.127 AddressClassSubnetBroadcast 201.222.10.60255.255.255.248C201.222.10.63201.222.10.56 Subnet Mask 15.16.193.6255.255.248.0A15.16.199.25515.16.192.0 128.16.32.13255.255.255.252B128.16.32.15128.16.32.12 153.50.6.27255.255.255.128B153.50.6.0

6. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-6 Written Exercise: Answers Local LoopCustomer PremisesService Provider NT1 BRI 0 S 0 NT1 TA U U S/T R Label the functional elements and reference points

7. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-7 Write the IPX addresses and encapsulation types for R3 Encapsulation Network Address R3 Interface Name S0 hdlc S1 hdlc E1 novell-ether Written Exercise: IPX Parameter Planning S0 hdlc Network b001 E0 SAP E1 S1 S1 hdlc S0 Network c0b0 Network d100 Network b1b0 E0 novell-ether R2R3 R4 R1 E1 b1b0 c0b0 d100

8. © 2000, Cisco Systems, Inc. www.cisco.com ICND v1.0a—D-8 Blank for pagination