Overview

Introduction

The Understand TCP/IP Services Part 2 module provides you with the instruction and computer hardware to develop your hands on skills in the defined topics. This module includes the following exercises:

  • Installing and Configuring DHCP
  • Installing and Configuring DNS
  • Understanding Lightweight Directory Access Protocol (LDAP)

Exam Objectives

The following exam objectives are covered in this lab:

  • 220-901: 3.4 Explain common TCP and UDP ports, protocols and their purpose (DHCP, DNS, LDAP)
  • 220-902: 1.6 Given a scenario, install and configure Windows networking on a client/desktop (Network shares/administrative shares/mapping drives, Remote Desktop Connection)
  • 220-902: 2.4 Summarize the properties and purpose of services provided by networked hosts (DHCP Server, DNS Server)

Lab time: It will take approximately 1 hour to complete this lab.

Exercise 1 - Installing and Configuring DHCP

Devices like servers, workstations, routers, printers, mobile devices and others that use TCP/IP as network transport require a numeric Internet Protocol (IP) address. These numeric addresses can be entered manually called fixed or static IP address into each device. Static IP addresses are normally assigned to servers, routers and some dedicated workstations. A major drawback of static IP addresses is the possibility of having duplicate IP addresses assigned to more than one device which will cause network connectivity issues. To remedy this problem, an IP address can be configured automatically by setting it to be dynamically assigned to a device by connecting to a Dynamic Host Configuration Protocol (DHCP) server.

Dynamic Host Configuration Protocol (DHCP) is a network service that leases out IP addresses to computers on a network. DHCP streamlines the allocation of IP addresses to computers as it prevents duplicate IP addresses and ensures correct configuration of network settings like subnet mask, default gateway and DNS, because the IP address pool is configured to assign a unique IP address on just one computer.

Exercise 2 - Installing and Configuring DNS

Domain Name System (DNS) is a network service that translates computer names or hostnames to numeric IP addresses and vice-versa. DNS is essential in a TCP/IP network as it helps devices find each other and connect to available services in a networked environment. Although largely associated with the Internet, DNS can be used in a private network for:

  • Simplicity - Computer names are easier to remember and recall than numerical IP addresses.
  • Consistency- IP addresses can change while computer names can remain the same.

In this exercise, you will learn to install and configure DNS in a Windows domain network.

Exercise 3 - Understanding Lightweight Directory Access Protocol (LDAP)

A directory is a database of network objects that is usually maintained by operating systems such as Windows Server 2012. To administer this directory, software vendors implement a directory service that is accessible only to authorized personnel of an organization. Windows Server 2012 implements Active Directory as means of organizing network objects like users, groups, computers, printers and among others. You access the network objects using tools like Active Directory Users and Computers.

Lightweight directory access protocol (LDAP) is a TCP/IP protocol used for accessing a directory service. LDAP listens on TCP port number 389 for incoming connections from other devices. Software vendors like Microsoft have their own implementation on how to access the Active Directory services using LDAP. In this exercise, you will use another tool called ADSI Edit to connect to Active Directory services.

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