What unique identifier is burned into every NIC at manufacture?

MAC address

True or False: Hubs create separate collision domains for each port.

False. Hubs create a single collision domain shared by all ports.

A device needs 25W of power. Which PoE standard should you use?
A) 802.3af
B) 802.3at
C) 802.3bt
D) None needed

B) 802.3at (PoE+ provides 30W, while 802.3af only provides 15.4W)

What is the maximum distance for Cat 6a cable at 10 Gbps?

100 meters

Fill in the blank: _____ switches support VLANs and QoS configuration options.

Managed

Which OSI layer does a router operate at?

Layer 3 (Network)

What are the three non-overlapping 2.4 GHz Wi-Fi channels in North America?

Channels 1, 6, and 11

True or False: Single-mode fiber uses LED light sources.

False. Single-mode fiber uses laser light sources.

A user accesses local resources but not internet. What should you check first?
A) DNS settings
B) Default gateway
C) Cable connection
D) Switch ports

B) Default gateway (routes traffic to external networks like internet)

What does NAT allow multiple devices to share?

One public IP address

Fill in the blank: _____ cable is required in air-handling spaces per fire codes.

Plenum-rated

Which wireless encryption is the current best practice standard?

WPA3

What happens when a PoE device needs more power than the switch provides?

Device may not power on or reboot randomly under load

True or False: Crossover cables are frequently needed with modern switches.

False. Modern switches have Auto-MDIX making crossover cables rarely needed.

Which fiber connector type is most common in modern networks?
A) ST
B) SC
C) LC
D) FC

C) LC (small form-factor, push-pull design)

What component converts digital signals to match ISP infrastructure format?

Modem

Fill in the blank: A _____ panel organizes network cables using 110 punch-down blocks.

Patch

Why would you use a PoE injector instead of a PoE switch?

When you need to power only a few devices cost-effectively

What causes collision lights to blink constantly during high network traffic?

Using a hub instead of a switch

True or False: Multimode fiber supports longer distances than single-mode fiber.

False. Single-mode supports 100+ km while multimode supports up to 2 km.

Which cable category supports 1 Gbps up to 100 meters?
A) Cat 5
B) Cat 5e
C) Cat 6
D) Cat 6a

B) Cat 5e

What protocol does DHCP use to automatically assign IP addresses?

DHCP (Dynamic Host Configuration Protocol)

Fill in the blank: RG-6 coaxial cable uses _____ connectors.

F

A WAP works on bench but fails after ceiling installation. Most likely cause?

Wrong cable type or miswired cable (crossover instead of straight-through)

What advantage does fiber optic cable have over copper in electrical environments?

Immunity to electromagnetic interference (EMI)

True or False: Fat APs require a wireless controller to operate.

False. Fat APs operate independently; thin APs require wireless controllers.

Which PoE standard provides up to 100W of power?
A) 802.3af
B) 802.3at
C) 802.3bt
D) 802.3az

C) 802.3bt (PoE++)

What type of firewall tracks active connections automatically?

Stateful firewall

Fill in the blank: T568A and T568B are _____ standards for cable termination.

Wiring

Why should you disable WPS on wireless access points?

To prevent brute-force attacks

A fiber link works intermittently with LEDs turning off and on. What should you check first?

Clean connectors and inspect cable for damage or sharp bends

True or False: Switches use IP addresses to forward traffic between devices.

False. Switches use MAC addresses; routers use IP addresses.

Which 802.11 standard operates on 2.4/5/6 GHz frequencies?
A) 802.11n
B) 802.11ac
C) 802.11ax
D) 802.11g

C) 802.11ax (Wi-Fi 6)

What is the core diameter difference between single-mode and multimode fiber?

Single-mode: 8-10 microns; Multimode: 50-62.5 microns

Fill in the blank: A switch operates at Layer _____ of the OSI model.

2 (Data Link)