CNS301 Computer Networks Labs Overview
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Questions and Answers

What does the ARP protocol primarily resolve?

  • MAC addresses to domain names
  • IP addresses to MAC addresses (correct)
  • Domain names to IP addresses
  • Hostnames to IP addresses
  • Which netstat command displays the status of ports in use?

  • netstat -e
  • netstat -s
  • netstat -r
  • netstat -a (correct)
  • What information does the netstat -e command provide?

  • Current resolution of MAC addresses
  • Domain name server status
  • Ethernet statistics like bytes sent and received (correct)
  • Active TCP connection details
  • In which mode does nslookup print a list of hosts in a domain?

    <p>Interactive mode</p> Signup and view all the answers

    What is the purpose of the command 'arp -a'?

    <p>To list IP addresses and their associated MAC addresses</p> Signup and view all the answers

    What does the netstat -r command show?

    <p>The routing table and interface details</p> Signup and view all the answers

    How does non-interactive mode of nslookup operate?

    <p>It prints details for a single host or domain only</p> Signup and view all the answers

    Which netstat command is used to yield Ethernet statistics?

    <p>netstat -e</p> Signup and view all the answers

    What is the main purpose of using the 'tracert' command?

    <p>To determine the route and hop count to a destination</p> Signup and view all the answers

    What does the acronym PING stand for?

    <p>Packet Internet Groper</p> Signup and view all the answers

    Which command would you use to check if the website 'www.uit.edu' is reachable?

    <p>ping <a href="http://www.uit.edu">www.uit.edu</a></p> Signup and view all the answers

    When using PING, how can you specify the number of packets to send?

    <p>Ping -n number</p> Signup and view all the answers

    What action does the command 'ping -a ip address' perform?

    <p>It resolves the IP address to its domain name.</p> Signup and view all the answers

    What could happen if a student arrives late to the lab by more than 20 minutes?

    <p>They will not be allowed to attend the lab.</p> Signup and view all the answers

    Which of the following is NOT a valid option for using the ping command?

    <p>ping --domain <a href="http://www.uit.edu">www.uit.edu</a></p> Signup and view all the answers

    What should students remember to do with their lab work?

    <p>Submit it on the same day it is performed.</p> Signup and view all the answers

    What happens if no second argument is provided when using a DNS name server?

    <p>The default DNS name server will be used.</p> Signup and view all the answers

    Which option in the FTP syntax enables debugging and displays all commands passed between the client and server?

    <p>-d</p> Signup and view all the answers

    What does the '-i' parameter do when using FTP?

    <p>It disables interactive prompting during multiple file transfers.</p> Signup and view all the answers

    Which FTP parameter allows for the specification of a text file containing FTP commands to be executed automatically?

    <p>-s:FileName</p> Signup and view all the answers

    What do the wildcard characters in FTP allow you to do?

    <p>Match multiple files when specifying local paths.</p> Signup and view all the answers

    Study Notes

    Lab Information

    • Course Code: CNS301
    • Course Title: Computer Networks
    • Multiple labs are listed, each with a unique objective and tasks

    Lab 01: TCP/IP Utilities

    • Objective: Students learn diagnostic commands for troubleshooting network problems.
    • Tracert: A utility to trace the route and hop count to a destination.
    • Ping: A diagnostic tool to check host reachability (either by name or IP address).

    Lab 02: Introduction to Boson Network Simulator and Packet Tracer

    • Objective: To increase awareness of Packet Tracer and Boson Network Simulator.
    • Boson Network Simulator: Application mimicking network scenarios, allowing design and configuration of network devices (routers/switches) like in a real environment.
    • Packet Tracer: Alternative simulator, enabling visual representation of network behaviour. Allows real-time or simulation mode.

    Lab 03: Creating Straight and Cross Cable

    • Objective: To understand and create straight and crossover cables using RJ-45 connectors and crimping tools.
    • Components: Includes twisted-pair cables (STP, UTP, ScSTP), RJ-45 connectors, and crimping tools.
    • Purpose of Different Cable Types: Different categories of twisted pair cables are defined based on data rates and usages..

    Lab 04: Implementing FTP Server

    • Objective: To implement an FTP server on Packet Tracer and explore related commands.
    • File Transfer Protocol (FTP): An application layer protocol enabling file transfer between clients and servers over a network.

    Lab 05: DHCP and DNS

    • Objective: Exploring the efficacy of DHCP (Dynamic Host Configuration Protocol) and DNS (Domain Name System) servers in a wired network.
    • DHCP: A network management protocol assigning IP addresses to devices automatically.
    • DNS: Converts domain names (e.g., www.example.com) into IP addresses for website/application locations.

    Lab 06: HUB and BRIDGE

    • Objective: Configuring a network with Hub and Bridge devices.
    • Hub: A simple multi-port repeater forwarding data to all connected ports.
    • Bridge: Interconnects multiple networks, filtering traffic, improving performance to some extent, and separating collision domains.

    Lab 07: Introduction to Switches & Segregation using VLANs

    • Objective: Basic switch configuration and segregation of networks using VLANs (Virtual LANs).
    • VLANs: Subdivide a physical network into multiple logical networks enhancing privacy and security.

    Lab 08: Removing loops using spanning tree protocol and Implementing port security

    • Objective: Remove loops in a network using the spanning tree protocol and implement port security on a switch to prevent unauthorized connections.
    • Spanning Tree Protocol (STP): A protocol for detecting and preventing loops in a network, improving network reliability.
    • Port Security: Implementing limitations on the number of devices connected to ports on a switch, enhancing network security.

    Lab 09: Introduction to routers and setting up static routes

    • Objective: Introduction to routers and setting up static routes.
    • Router: A network device forwarding packets between networks based on routing tables.
    • Static Routes: Manually configured routes to guide forwarding packets, ensuring they travel via the desired paths within a network.

    Lab 10: Routing Information Protocol

    • Objective: Introduction to the routing protocol.
    • Routing Protocol: Used by routers for exchanging information about networks and finding the most efficient path to deliver packets.

    Lab 11: Inter-VLAN Routing (Using Router-on-Stick)

    • Objective: Inter-VLAN routing using router-on-a-stick.
    • Router-on-a-Stick: A configuration method enabling inter-VLAN communication through a single physical router interface.

    Lab 12: Routing Protocol IGRP & EIGRP

    • Objective: Introduction to IGRP (Interior Gateway Routing Protocol) and EIGRP (Enhanced Interior Gateway Routing Protocol)
    • IGRP: Legacy distance vector protocol providing multiple metrics.
    • EIGRP: Advanced distance vector protocol improving convergence speed and efficiency through incremental updates.

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    Description

    Explore the objectives and tools used in various labs of the Computer Networks course (CNS301). Learn about TCP/IP utilities for troubleshooting, the Boson Network Simulator, and Packet Tracer for network design. Understand practical tasks like creating straight and cross cables to enhance your networking skills.

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