NT1210Uni5Lab5
ITT TECHNICAL INSTITUTE
NT1210 INTRO TO NETWORKING
UNIT5LAB5.2 MAC & IP Addresses
MR. RANDY VOGL
Gus Perez
MAC Address Structure
The Media Access Control (MAC) address is a unique physical address for each NIC. This address is encoded in the read-only memory (ROM) of the NIC and, ideally, is not subject to change (though some vendors do allow this). The MAC address is 48 bits in length (6 bytes) and is commonly represented as 12 hexadecimal characters (separated by hyphens or colons depending upon the application). You can see an example of a MAC address in Figure 5-1. The first 24 bits are the manufacturer’s Organizationally Unique Identifier (OUI); the last 24 bits are uniquely assigned by the manufacturer for each NIC that it produces.
Exercise 5.2.1 Why must a MAC address be unique for every NIC produced? What effect will it have on the network if two devices from two different manufacturers share the last 24 bits of their MAC addresses? Explain your answer. Use your textbook and the Internet to research your answer A MAC address is unique for every NIC produced by the vendor, because switches forward the frames based on their destination MAC address. If two or more devices or computers share the same MAC address (including the last 24 bits in the MAC address), the switches will be confused and having a hard time as to which computer’s NIC should they forward the frames.
Every NIC has its own MAC address, so you will have a unique MAC address for each network adapter present on your computer. To determine the MAC address of a network interface on your Windows PC, follow these steps:
Step1
Step2 Click the support tab,
Exercise 5.2.2 What information about the network connection is given on the Support tab of the status window?
The IP Adrress 10.162.108.48, the subnet 255.255.252.0, and the gateway or router 10.162.110.1 address. This comes from step2 above.
Step 3.Click the Details button on the Support tab. This will open a new window with the complete
NT1210 INTRO TO NETWORKING
UNIT5LAB5.2 MAC & IP Addresses
MR. RANDY VOGL
Gus Perez
MAC Address Structure
The Media Access Control (MAC) address is a unique physical address for each NIC. This address is encoded in the read-only memory (ROM) of the NIC and, ideally, is not subject to change (though some vendors do allow this). The MAC address is 48 bits in length (6 bytes) and is commonly represented as 12 hexadecimal characters (separated by hyphens or colons depending upon the application). You can see an example of a MAC address in Figure 5-1. The first 24 bits are the manufacturer’s Organizationally Unique Identifier (OUI); the last 24 bits are uniquely assigned by the manufacturer for each NIC that it produces.
Exercise 5.2.1 Why must a MAC address be unique for every NIC produced? What effect will it have on the network if two devices from two different manufacturers share the last 24 bits of their MAC addresses? Explain your answer. Use your textbook and the Internet to research your answer A MAC address is unique for every NIC produced by the vendor, because switches forward the frames based on their destination MAC address. If two or more devices or computers share the same MAC address (including the last 24 bits in the MAC address), the switches will be confused and having a hard time as to which computer’s NIC should they forward the frames.
Every NIC has its own MAC address, so you will have a unique MAC address for each network adapter present on your computer. To determine the MAC address of a network interface on your Windows PC, follow these steps:
Step1
Step2 Click the support tab,
Exercise 5.2.2 What information about the network connection is given on the Support tab of the status window?
The IP Adrress 10.162.108.48, the subnet 255.255.252.0, and the gateway or router 10.162.110.1 address. This comes from step2 above.
Step 3.Click the Details button on the Support tab. This will open a new window with the complete