Overview

Introduction

Welcome to the Network Services and Protocols (Part 2) Practice Lab. In this module, you will be provided with the instructions and devices needed to develop your hands-on skills.

Learning Outcomes

In this module, you will complete the following exercises:

  • Exercise 1 - Verify Port 80 for HTTP
  • Exercise 2 - Verify Port 443 for HTTPS
  • Exercise 3 - Contrast TCP and UDP Protocols
  • Exercise 4 - Using a Port Scanner

After completing this lab, you will be able to:

  • Start packet capture of packets exchanged using HTTP protocol
  • Create HTTP traffic by accessing a website
  • Verify Port 80 for HTTP
  • Capture HTTPS traffic using WireShark
  • Contrast TCP and UDP Protocols
  • Download and Install Advanced IP Scanner

Exam Objectives

The following exam objectives are covered in this lab:

  • N10-007 1.1: Explain the purposes and uses of ports and protocols (Protocols and ports, HTTP 80)
  • N10-007 1.1: Explain the purposes and uses of ports and protocols (Protocols and ports, HTTPS 443)
  • N10-007 3.4: Given a scenario, use remote access methods (VPN, SSL/TLS/DTLS)
  • N10-007 3.4: Given a scenario, use remote access methods (VPN, HTTPS/management URL)
  • N10-007 5.2: Given a scenario, use the appropriate tool (Software tools, Packet sniffer)
  • N10-007 5.2: Given a scenario, use the appropriate tool (Software tools, Port scanner)
  • N10-007 5.2: Given a scenario, use the appropriate tool (Software tools, Protocol analyzer)

Lab Duration

It will take approximately 1 hour to complete this lab.

Exercise 1 - Verifying Port 80 for HTTP

Hypertext Transfer Protocol (HTTP) is application level protocol in TCP/IP that enables users of the World Wide Web to exchange data. HTTP supports a huge variety of data formats - from text to voice to all way through to multi-media. HTTP servers typically listen on TCP port 80 for any session requests from HTTP clients.

Learning Outcomes

After completing this exercise, you will be able to:

  • Start packet capture of packets exchanged using HTTP protocol
  • Create HTTP traffic by accessing a website
  • Verify Port 80 for HTTP

Exercise 2 - Verifying HTTPS Port 443

HTTPS, short for Hypertext Transfer Protocol Secure, is essentially HTTP with SSL/TLS added for security. The security feature helps prevent unauthorized access to information available on a network. This is especially relevant to networks accessed over WANs, such as the Internet. TCP reserves port #443 for the HTTPS protocol.

Learning Outcomes

After completing this exercise, you will be able to:

  • Capture HTTPS traffic using WireShark

Exercise 3 - Contrast TCP and UDP Protocols

Both TCP (transmission control protocol) and UDP (user datagram protocol) are a part of the IP (Internet Protocol) suite of protocols. Both these protocols convert data into segments to enable exchange across networked computers. However, the two are very dissimilar in their details of operation; and hence have very different application.

Learning Outcomes

After completing this exercise, you will be able to:

  • Contrast TCP and UDP Protocols

Exercise 4 - Using a Port Scanner

A port scanner is a software tool used for probing into local or remote systems to find out open TCP/UDP ports and collect system information like operating system type installed on the computer. This is used by system administrators to validate the security policy of firewalls and by hackers to determine the open ports on a computer that can be possibly exploited.

You will see that a port scanner is much more than just a piece of software that pings many devices at once. It has many more capabilities, some of which you will experiment with here.

A wide array of port scanning software either free or subscription-based are available for public use. You can use a port scanning tool in a test lab environment. However, precaution must be observed when using this tool in a corporate network, as port scans normally trigger an alert when detected by firewall appliances.

Learning Outcomes

After completing this exercise, you will be able to:

  • Download and Install Advanced IP Scanner

Comprehensive Learning

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