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lab1_networkBasic

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									COMP3670/COMP7090                                                                 1

Lab 1a


Understand your hardware:


Objective
• Become familiar with the basic peripheral components of a PC computer system.
• Identify PC connections including network attachment.
• Examine the internal PC configuration and identify major components.
• Observe the boot process for the Windows operating system.
• Use the Control Panel to find out information about the PC.


Background
Knowing the components of a PC is valuable when troubleshooting.
This knowledge is also important to success in the networking field.
Before beginning, the instructor or lab assistant should have a typical desktop PC
available with all peripherals. Peripherals include the keyboard, monitor, mouse,
speakers or head phones, a network interface card (NIC), and a network cable. The
system unit cover should be removed. If the cover is not removed, the tools should
be provided to remove it. Work individually or in teams. In addition, the instructor
needs to identify the location of the A+ or PC hardware training materials.


Step 1 Examine the computer and peripheral components
Examine the computer and peripheral components both front and back.
Note: The components and configuration of the PC may vary.
What are the manufacturer and model number of the NIC?
Manufacturer:
Model Number:
Static / Dynamic IP:
Netmask:
HostName:
COMP3670/COMP7090                                                                 2

Step 2 Assemble the PC components observe the boot process
Assemble the PC components, attach all peripherals, and boot the PC. Observe the
boot process.
The computer should boot to the Windows operating system. If the computer does
not boot, contact the lab assistant. Observe the boot process.
Did the Windows operating system boot correctly? ____________________
Did the screen show how much memory there was as the system was booting? ____


Step 3 Gather basic information about the computer CPU and RAM
Click the Start button. Select Settings then Control Panel. Click on the System icon
and then the General tab. View the information about the computer using the
operating system.
What is the Central Processing Unit? _____________________
What is the speed in MHz of the CPU? ____________________
How much RAM is installed? ___________________________
COMP3670/COMP7090                                                                           3

Lab 1b


Understand your network setting:


Objective
• Identify tools used to discover a computer network configuration with various
operating systems.
• Gather information including connection, host name, Layer 2 MAC address and
Layer 3 TCP/IP network address information.
• Compare network information to other PCs on the network.


Background
This lab assumes the use of any version of Windows. This is a non-destructive lab and
can be done on any machine without concern of changing the system configuration.
Ideally, this lab is performed in a classroom or other LAN environment that connects
to the Internet.
This lab can be done from a single remote connection via a modem or DSL-type
connection.


Step 1 Connect into the Internet
Establish and verify connectivity to the Internet. This ensures the computer has an IP
address.


Step 2 Gather TCP/IP configuration information
Use the Start menu to open the Command Prompt, an MS-DOS-like window. Press
Start >Programs > Accessories > Command Prompt or Start > Programs > Command
Prompt.
The following figure shows the Command screen. Type ipconfig and press the Enter
key. The spelling of ipconfig is critical while case is not. It is short for IP Configuration.
This first screen shows the IP address, subnet mask, and default gateway. The IP
address and the default gateway should be in the same network or subnet, otherwise
this host would not be able to communicate outside the network. In the figure the
subnet mask tells us that the first three octets must be the same to be in the same
network.
Note: If this computer is on a LAN, the default gateway might not be seen if it is
running behind a Proxy Server. Record the following information for this computer.


Step 3 Record the following TCP/IP information for this computer
COMP3670/COMP7090                                                                    4

IP address: ___________________________________________________
Subnet Mask: _________________________________________________
Default Gateway: ____________________________________________


Step 4 Compare the TCP/IP configuration of this computer to others on the LAN
If this computer is on a LAN, compare the information of several machines.
Are there any similarities? ______________________________________
What is similar about the IP addresses? ________________________
What is similar about the default gateways? ___________________
The IP addresses should share the same network portion. All machines in the LAN
should share the same default gateway.
Record a couple of the IP Addresses:
____________________________________________________________________


Step 5 Check additional TCP/IP configuration information
To see detailed information, type ipconfig /all and press Enter. The figure shows the
detailed IP configuration screen.




The host name, including the computer name and NetBIOS name should be
displayed. Also, the DHCP server address, if used, and the date the IP lease starts and
ends should be displayed. Look over the information. Entries for the DNS, used in
name resolution servers, may also be present.
The previous figure reveals that the router is performing both DHCP and DNS services
for this network. This would likely be a small office or home office (SOHO) or small
branch office implementation.
Notice the Physical Address (MAC) and the NIC model (Description).
COMP3670/COMP7090                                                                 5

In the LAN, what similarities about the Physical (MAC) Addresses are seen?
______________________________________________________


While not a requirement, most LAN administrators try to standardize components
like NICs.
Therefore, it would not be surprising to find all machines share the first three Hex
pairs in the adapter
address. These three pairs identify the manufacturer of the adapter.
Write down the IP addresses of any servers listed:
___________________________________________________________________


Write down the computer Host Name:
____________________________________________________________________
Write down the Host Names of a couple other computers:
_____________________________________________________________________
Do all of the servers and workstations share the same network portion of the IP
address as the student workstation? ____________________
It would not be unusual for some or all of the servers and workstations to be in
another network. It means that the computer default gateway is going to forward
requests to the other network.
COMP3670/COMP7090                                                                6

Reflection
Based on observations, what can be deduced about the following results taken from
three computers connected to one switch?


Computer 1
IP Address: 192.168.12.113
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.12.1
Computer 2
IP Address: 192.168.12.205
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.12.1
Computer 3
IP Address: 192.168.112.97
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.12.1


Should they be able to talk to each other? Are they all on the same network? Why or
why not? If something is wrong, what is most likely the problem?
_____________________________________________________________________
COMP3670/COMP7090                                                                  7

Lab 1c


Understand “Ping” and “tracert”


Objective
• Learn to use the TCP/IP Packet Internet Groper (ping) command from a
workstation.
• Learn to use the Trace Route (tracert) command from a workstation.
• Observe name resolution occurrences using WINS and/or DNS servers.


Background
This lab assumes the use of any version of Windows. This is a non-destructive lab and
can be done on any machine without concern of changing the system configuration.
Ideally, this lab is performed in a LAN environment that connects to the Internet. It
can be done from a single remote connection via a modem or DSL-type connection.
The student will need the IP addresses that were recorded in the previous lab.


Step 1 Establish and verify connectivity to the Internet This ensures the computer
has an IP address.


Step 2 Access the command prompt
Windows 95 / 98 / Me users – Use the Start menu to open the MS-DOS Prompt
window. Press Start > Programs > Accessories > MS-DOS Prompt or Start > Programs
> MS-DOS. Windows NT / 2000 / XP users – Use the Start menu to open the
Command Prompt window. Press Start > Programs > Accessories > Command Prompt
or Start > Programs > Command Prompt or Start > All Programs > Command Prompt.


Step 3 ping the IP address of another computer In the window, type ping, a space,
and the IP address of a computer recorded in the previous lab.
The following figure shows the successful results of ping to this IP address.
COMP3670/COMP7090          8




Ping hk.yahoo.com


Use tracert hk.yahoo.com
COMP3670/COMP7090                                                                    9

Lab 1d


Config a LAN network




Objective
• Identify the Ethernet or Fast Ethernet interfaces on the router
• Identify and locate the proper cables to connect the router and PC to a hub or
switch
• Use the cables to connect the router and PC to the hub or switch


Background / Preparation
This lab focuses on the ability to connect the physical cabling between Ethernet LAN
devices such as hubs and switches and the appropriate Ethernet interface on a router.
The computer(s) and router should be preconfigured with the correct IP network
settings. Start this lab with the computer(s), router, and the hub or switch all turned
off and unplugged. The following resources will be required:
• At least one workstation with an Ethernet 10/100 NIC installed
• One Ethernet switch or hub
• One router with an RJ-45 Ethernet or Fast Ethernet interface or an AUI interface
• Several Ethernet cables, which are straight-through and crossover, to choose from
for connecting the workstation and router to the hub or switch.
COMP3670/COMP7090                                                                   10

Step 1 Get Start


Step 2 Identify the proper cables and connect router


Step 3 Connect the workstation Ethernet cabling


Step 4 Verifying the connection
a. Plug in and turn on the routers, computers, and hub or switch.
b. To verify the router connections, insure that the link light on the router interface
and the hub or switch interface are both lit.
c. To verify the computer connections, insure that the link light on the NIC and the
hub or switch interface are both lit.


Step 5 Ping on router’s IP
COMP3670/COMP7090                                                                11

Lab 1e


Building a basic route LAN




Objective
• Create a simple routed wide-area network (WAN) with two PCs, two switches or
hubs, and two routers
• Identify the proper cables to connect a PC and router to each switch
• Identify the proper cables to connect the routers to form a WAN link
• Configure workstation IP address information
• Test connectivity using the ping command


Background / Preparation
This lab focuses on the ability to connect two simple LANs, each consisting of a
workstation and a switch or hub, to form a basic router-to-router WAN. A router is a
networking device that can be used to interconnect LANs which routes packets
between different networks using Layer 3 IP addressing.
COMP3670/COMP7090                                                                   12

Routers are typically used to connect the Internet.
In addition to the physical and data link connections, which are Layers 1 and 2, the
computers and routers must also be configured with the correct IP network settings,
which is Layer 3, so that they can communicate. Straight-through patch cables are
used to connect each PC and router to its switch or hub. A LAN cables are used to
create the simulated WAN link between the routers.x


Step 1 Cable the router LAN links
a. Router configuration
The routers should be preconfigured by the instructor or lab assistant so that the
Ethernet interface on each router has the proper IP address and subnet mask as
indicated in the table below. This will allow the routers to route packets between
local-area networks 192.168.1.0 and 192.168.2.0.


Router LAN Interface IP Address Subnet mask
Router – A 192.168.1.1 255.255.255.0
Router – B 192.168.2.1 255.255.255.0


b. Connecting the cables
The connection between the router and the hub or switch will be accomplished using
a CAT 5 straight-through patch cable.


Step 2 Verify the physical Ethernet connections
a. Plug in and turn on the computers, switches/hubs and routers. To verify the
   connections, insure that the link lights on the both PC NICs, both switch/hub
   interfaces and router Ethernet interfaces are lit. Are all link lights lit?
   _____________________
b. If not, check connections and cable types.


Step 3 Cable the router WAN link
a. Router configuration
Router A WAN should have the proper IP address and subnet mast as indicated in the
table below. The network interconnecting the router WAN interfaces is 192.168.3.0.
Router Clocking WAN Interface IP Address Subnet mask
Router – A 192.168.3.1 255.255.255.0 Gateway 192.168.3.2
Router – B 192.168.3.2 255.255.255.0 Gateway 192.168.3.1
Some Hints screen capture for you, please change the IP to what IP you are using:
COMP3670/COMP7090   13

Router A:
COMP3670/COMP7090                                                                   14

Router B:




c. Connecting the cables
Configure Workstation IP settings


Windows XP users should do the following:
• Click on Start > Settings > Control Panel and then click the Network Connection
icon.
• Select the Local Area Network Connection and click on Change settings of this
connection.
• Select the TCP/IP protocol icon that is associated with the NIC in this PC.
• Click on Properties and click on Use the following IP address.


Set the IP address information for each PC according to the information in the table.
Note that the IP address of each PC is on the same network as the default gateway,
which is the Ethernet interface of the connected router. The default gateway is
required on local area networks that are connected to a router.
Computer             IP Address            Subnet mask            Default Gateway
PC – A               192.168.1.2           255.255.255.0          192.168.1.1
COMP3670/COMP7090                                                             15

PC – B              192.168.2.2            255.255.255.0     192.168.2.1


b. Test connectivity
Ping the IP address of the computer on the other LAN. Enter the following command
at the command prompt.


C:>ping 192.168.1.1 (or 192.168.2.1)
This will test IP connectivity from one workstation through its switch and router
across the WAN link and through the other router.


C:>ping 192.168.3.1 (or 192.168.3.2)
This will test IP connectivity from one workstation through its switch and router
across the WAN link and through the other router.

C:>ping 192.168.1.2 (or 192.168.2.2)
This will test IP connectivity from one workstation through its switch and router
across the WAN link and through the other router and switch to the other PC.
Doesn’t Work And Why ???


Explanation: Go to Next Lab NAT Routing.

								
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