G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR Department:-Computer Science & Engineering Branch:-8 th Semester[CSE] Subject:- Computer Networks
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1 G.H.RAISONI COLLEGE OF ENGINEERING, NAGPUR Department:-Computer Science & Engineering Branch:-8 th Semester[CSE] Subject:- Computer Networks List of Experiments 1. Write a program in C for PC to PC communication using RS-232 port. 2. Write a program for encryption and decryption using monoalphabetic substitution or polyalphabetic substitution. 3. Write a program to implement Huffman data compression algorithm to generate Prefix codes and encoded text. 4. Study of LAN transmission media s, topologies, interconnection devices & LAN standards. 5. Study of TCP/IP & Internet. 6. Study of college LAN. 7. Design of LAN for s typical branch office of the bank. 8. Design of WAN for connecting all the branches of the bank. 9. Study of Novell Netware.
2 Experiment No. 1 Aim :- Write a program in C for PC to PC communication using RS-232 port. 1. Digital data transmission methods : serial and parallel. 2. Synchronous and asynchronous data transmission. 3. DTE-DCE interface. 4. EIA-232 interface:- Mechnical specification,electrical specification and Functional specification. 5. Null modem 6. Other interface standards. 7. Diagrams to be drawn are: a. Nill modem pin connection. b. Pin configuration of EIA-232,DB-25 c. Pin configuration of EIA-232,DB-9 Program :- Result :- Write the output of the program. 1) Explain the two modes of transmitting binary data across the link. 2) What are the advantages and disadvantages of parallel transmission? 3) What are the functions of DTE? 4) What are the functions of DCE?
3 Experiment No. 2 Aim :- Write a program for encryption and decryption using monoalphabetic Substitution or polyalphabetic substitution. Theory : - Cryptography,substitution cipher,caesar cipher,monoalphabetic & polyalphabetic substitution, cipher vigenere cipher, DES and public key encryption. Program :- Result :- Cryptographic methods have been studied. 1) What is the relation between plaintext and cipher text? 2) Why is polyalphabetic substitution superior to monoalphabetic substitution? 3) What are the two categories of encryption decryption methods? 4) What is the concept behind transpositional character level encryption?
4 Experiment No. 3 Aim :- Write a program to implement Huffman data compression algorithm to generate Prefix codes and encoded text. 1. Need of data compression in data communication 2. Approaches for data compression 3. Huffman compression algorithm. Algorithm :- Algorithm for a. Count of character frequencies. b. Construction of prefix code. c. Encoding the text. Program :- Result :- Write the output of the program for sample inputs. 1) What are the categories of data compression? 2) What are MPEG? 3) What are JPEG? 4) What is the different between JPEG & MPEG?
5 Experiment No. 4 Aim :- Study of LAN transmission media s, topologies, interconnection devices & LAN standards. Transmission Media 1) Guided media a. Twisted pair 1) UTP-EIA categories, connectors 2) STP b. Coaxial cable Radio Government ratings RG-8, RG-9, RG-11,RG-58, RG-59 Connectors c. Optical fiber Propagation modes Fiber sizes Light-source for optical cable Fiber optic connectors 2) Unguided Media or wireless communication 1.RF transmission 2 Terrestrial microwave 3.Satellite communication 4.Cellular telephony 3) Transmission impairments : Attenuation, Distortion and noise. 4) Media comparison 5) Network topologies : Mesh, Tree,Bus Ring and Hybrid topology. 6) Connection Devices : Repeaters,Bridges,Routers,Gateways,Hubs,Switches. 7) Project 802 : Categories,Broadband & base band,1 Base 2,100 Base T, Fast Ethernet, 100 Base-TX, 100 Base T4, Gigabit Ethernet and FDDI.
6 Diagram to be drawn are :- 1. UTP cable 2. Coaxial cable 3. Optical fiber cable 4. Network topologies, Mesh, Tree, Bus, Ring, Hybrid 5. Ethernet frame format Result :- Write the output of the program 1) What is smallest size of Ethernet Frame? 2) What is largest size of Ethernet Frame? 3) Why is coaxial cable is superior to twisted pair cable? 4) What is the difference between base band & broad band?
7 Experiment No. 5 Aim :- Study of TCP/IP & Internet. Layers of TCP/IP protocol suite,internet administration,ip addressing, Sub netting & super netting, ARP,ICMP,UDP,TCP,BOOTP & DHCP,DNS,TELNET& Rlogin, FTP, TFTP,SMTP, SNMP,HTTP,WWW,IPv6, RFC, Port addresses. Diagrams to be drawn : TCP/IP Protocol suite with various protocols of each layer Execute various commands like:- arp,net stat,telnet,ipconfig,ping,tracert.note down the output & purpose of each command. Result :- Result of various command and TCP/IP protocols studied. 1) What is MIME? 2) What is POP? 3) What is CGI? 4) What is HTML?
8 Experiment No. 6 Aim :- Study of college LAN. How the switches on hub are connected to a central location? How leased line is connected to a router? Where this router is connected, also find the distance of each hub or switch to central location. Suggest improvement. Diagram to be drawn :- Complete sketch of college LAN, showing no of computers connected in each lab to connecting devices like hub,switch etc. Result :- The college LAN is studied. 1) Why there is no bridge in college LAN? 2) What is the use of router in this campus? 3) What is the bandwidth of the leased line? 4) What need of the proxy server?
9 Experiment No. 7 Aim :- Design of LAN for s typical branch office of the bank. A typical branch of the bank consists of about 40 connected hosts, located on a single floor. One of these hosts is the mail server while another is a Database Server for the branch. The mail server handles all the incoming and outing mails of the branch employees. The database server records all the daily transactions carried in the branch. 1. Design a network topology to be used and the physical layout Plan the placing of hubs or switches in the office area and the no of connections to each hub or switch. 2. Mention the cost of accessories like hub/switch, type of connection cables, length of cable used etc. Give the final quotation for whole setup. 3. Analyze your design whether it is optimized for performance or for cost. Justify you selection of hardware. Result :- A LAN for typical branch office of a bank is successfully designed. 1) What is the maximum speed of your college LAN? 2) How will you find out MAC address of your computer or other computers in your LAN? 3) What are the loopholes in the current design of a LAN? What improvements you Suggest? 4) How will you check the connectivity of the computers in LAN?
10 Experiment No. 8 Aim : Design of WAN for connecting all the branches of the bank. The next requirement is to enable connectivity between the branches of the bank. The bank has one Head office (HO), which is to be connected to five Regional offices(ro).each RO in turn has ten Branches under its purview. Each branch requires intermittent connectivity to the RO for transferring transaction details to the Regional Database Server. The ROs on the other hand require 24-hour connectivity with the HO. 1. Design a WAN to inter-connect these offices. You may use private links(leased lines) between the branches or inter-connect through the Internet. 2. Mention the cost of additional hardware required ( routers,links etc.). Estimate an annual cost for the whole set up at each office. 3. Analyze your design and justify your selection of hardware/links. Result :- A WAN for branches of a bank is successfully designed. 1) Which networking devices are used in WAN? 2) What are the examples of WAN? 3) What are the advantages of using WAN? 4) What is packet format in WAN?
11 Experiment No. 9 Aim : Study of Novell Netware. 1. Network protocols used by NetWare 5 : IPX/SPX & NCP. 2. Open data link interface ODI. 3. Hardware requirements for NetWare servers. 4. NetWare loadable Modules NLM s. 5. NetWare Directory services NDS. 6. NetWare Printing system overview. 7. Security & Integrity in NetWare5? Passwords & login restriction,file system Security, trustee & trustee rights, bindery. 8. NetWare5 TCP/IP support. 9. DHCP & DNS support. 10. Creating & managing Login scripts. 11. Creating & managing group object. 12. Saving time with template. Selected Novell Commands : Client commands:- Attach,Listdir,login/logout,Map,Nprint,Rights,setpass,send,whoami etc. Server commands:- Broadcast,Disable login/enable login, printers, printer add, queue etc. Result :- Novell NetWare5 has been studied. 1) What is the function of server command broadcast.? 2) What is the function of client command attach 3) What is the function of client command setpass? 4) What is the function of client command whoami?
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