A MAC address is 48 bits long and is typically written as six groups of two hexadecimal digits. Which portion of a MAC address identifies the manufacturer of the network interface?

The first 12 bits, known as the hardware type

The middle 16 bits, known as the vendor code

The last 24 bits, known as the NIC-specific part

The first 24 bits, known as the OUI

A network engineer is explaining to a junior admin why MAC addresses are used at Layer 2. The junior admin asks why IP addresses are not used for forwarding within a LAN. What is the best explanation?

MAC addresses are faster to process than IP addresses.

IP addresses are logical and can change, while MAC addresses are physical and unique on the local network.

IP addresses are only used for the internet.

IP addresses are not unique on a LAN.

A network administrator is designing a network for a school. The school wants to isolate student traffic from staff traffic to prevent students from accessing staff resources. The administrator decides to use VLANs. What is the primary benefit of using VLANs in this scenario?

VLANs increase the number of MAC addresses a switch can learn.

VLANs allow devices on different subnets to communicate without a router.

VLANs reduce the size of broadcast domains, improving performance and security.

VLANs eliminate the need for IP addresses on end devices.

A switch has learned the MAC address 00:0C:29:AB:CD:EF on port Gi0/1. A frame arrives on port Gi0/2 with a destination MAC of 00:0C:29:AB:CD:EF. What will the switch do?

Drop the frame because the source and destination are on different ports.

Flood the frame out all ports except Gi0/2.

Forward the frame out port Gi0/1 only.

Update the MAC table to associate the destination with Gi0/2.

CiscoCertified Network Associate Automation (CCNA Automation)

Domain 6Objective 1

1. Describe the Purpose and Usage of MAC Addresses and VLANs 200-901 Practice Questions (Page 2)

Part of the 6.0 Network Fundamentals domain, which accounts for 15% of the 200-901 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 1–1 from this objective — we provide 38 practice questions to prepare you well beyond it. (estimate)

38questions here

8free pages

7concepts

15%of the exam

Questions 6–10

6foundation · easy
A MAC address is 48 bits long and is typically written as six groups of two hexadecimal digits. Which portion of a MAC address identifies the manufacturer of the network interface?
Select an answer first
7foundation · easy
Which VLAN range is considered the normal range and is supported on all Cisco switches?
Select an answer first
8expert · easy
A network engineer is explaining to a junior admin why MAC addresses are used at Layer 2. The junior admin asks why IP addresses are not used for forwarding within a LAN. What is the best explanation?
Select an answer first
9application · easy
A network administrator is designing a network for a school. The school wants to isolate student traffic from staff traffic to prevent students from accessing staff resources. The administrator decides to use VLANs. What is the primary benefit of using VLANs in this scenario?
Select an answer first
10application · medium
A switch has learned the MAC address 00:0C:29:AB:CD:EF on port Gi0/1. A frame arrives on port Gi0/2 with a destination MAC of 00:0C:29:AB:CD:EF. What will the switch do?
Select an answer first

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