Intro to Cyber Unit 3 Exam Review 2024

At which OSI layer does a router operate to forward network messages?

• Physical

• Data Link

• Transport

• Network

You've decided to implement Gigabit Ethernet on your network; each switch port is connected to a single device. Following the installation, you find one device connected to a switch that's only running at 100 Mbps. Which of the following is MOST LIKELY the cause?

• Impedance

• A short

• Crosstalk

• Collisions

Which of the following are advantages of using fiber optic cabling for a network? (Select two.)

• Easy to work with

• Greater cable distances without a repeater

• Immunity to electromagnetic interference

• Lower installation cost

• No special training or equipment is required

You're installing network wiring for a new Ethernet network at your company's main office building. The project specifications call for Cat 5e UTP network cabling and RJ45 wall jacks. Near the end of the project, you run out of wire before the last few runs are complete. You have a spool of Cat 3 network cable in storage. Upon closer inspection, it appears very similar to the Cat 5e wiring. To finish the project, should you use the Cat 3 cabling as a substitute for the Cat 5e cabling?

• No. The sheath surrounding Cat 5e cabling is much thicker than the Cat 3 sheath, creating an extra layer of shielding that reduces crosstalk and supports higher data rates.

• No. Cat 5e cabling uses a thicker copper wire than Cat 3 cabling, enabling higher data transmission rates.

• No. Cat 5e cabling has more twists per inch than Cat 3 cabling, reducing crosstalk and supporting higher data rates.

• Yes. You can use Cat 3 cabling as a substitute for Cat 5e cabling since they're electrically identical.

You're adding new wires in your building for some new offices. The building has a false ceiling that holds the lights and provides an air path for heating and air conditioning. You'd like to run your Ethernet cables in this area. Which type of cable must you use?

• STP cables

• Fiber optic cables

• Cat 5e or Cat 6a cables

• Plenum-rated cable

How do switches and bridges learn where devices are located on a network?

• When a frame enters a port, the destination MAC address is copied from frame header.

• When a frame enters a port, the source MAC address is copied from the frame header.

• When a frame enters a port, the destination IP address is copied from the frame header.

• When a frame enters a port, the source IP address is copied from the frame header.

Which of the following connectors is used with Ethernet 100BaseTX networks?

• BNC

• GG45

• ST

• RJ45

You are the network administrator for a small organization. Recently, you contracted with an ISP to connect your organization's network to the internet. Since doing so, it has come to your attention that an intruder has invaded your network from the internet on three separate occasions. Which type of network hardware should you implement to prevent this from happening again?

• Switch

• Firewall

• Hub

• Router

Which of the following hardware devices links multiple networks and directs traffic between networks?

• Repeater

• Hub

• Router

• Bridge

Which of the following is a valid MAC address?

• 34-9A-86-1G-B3-24

• 83-5A-5B-0B-31-55-F1

• 73-99-12-61-15

• C0-34-FF-15-01-8E