ATT COMPREHENSIVE PROFICIENCY
TEST 3 QUESTIONS AND ANSWERS
1. Which layer of the OSI model is primarily responsible for routing data packets between
different networks?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Physical Layer
Answer: B
Conceptual Explanation: The Network Layer (Layer 3) handles addressing and routing,
determining the best path for data to travel across networks.
2. What does the acronym SSID stand for in wireless networking?
A. Service Set Identifier
B. Secure System ID
C. Signal Strength Indicator Data
D. Synchronized Service ID
,Answer: A
Conceptual Explanation: SSID stands for Service Set Identifier, which is the name
assigned to a Wi-Fi network.
3. Which protocol is used to automatically assign IP addresses to devices on a network?
A. DHCP
B. HTTP
C. DNS
D. SMTP
Answer: A
Conceptual Explanation: Dynamic Host Configuration Protocol (DHCP) automatically
assigns IP addresses and other network configuration parameters to devices.
4. What is the primary purpose of a ‘Ping’ command in troubleshooting?
A. To encrypt a data packet
B. To increase bandwidth
C. To test connectivity between two network nodes
D. To change the MAC address
Answer: C
, Conceptual Explanation: Ping uses ICMP to check if a specific IP address is reachable and
to measure the round-trip time for messages sent.
5. Which hardware device is designed to filter incoming and outgoing network traffic based
on security rules?
A. Repeater
B. Hub
C. Firewall
D. Bridge
Answer: C
Conceptual Explanation: A firewall acts as a security barrier, monitoring and controlling
traffic based on predetermined security policies.
6. In networking, what does the term ‘Bandwidth’ refer to?
A. The maximum rate of data transfer across a path
B. The physical length of the cable
C. The number of devices connected to a router
D. The signal strength of a wireless access point
Answer: A
TEST 3 QUESTIONS AND ANSWERS
1. Which layer of the OSI model is primarily responsible for routing data packets between
different networks?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Physical Layer
Answer: B
Conceptual Explanation: The Network Layer (Layer 3) handles addressing and routing,
determining the best path for data to travel across networks.
2. What does the acronym SSID stand for in wireless networking?
A. Service Set Identifier
B. Secure System ID
C. Signal Strength Indicator Data
D. Synchronized Service ID
,Answer: A
Conceptual Explanation: SSID stands for Service Set Identifier, which is the name
assigned to a Wi-Fi network.
3. Which protocol is used to automatically assign IP addresses to devices on a network?
A. DHCP
B. HTTP
C. DNS
D. SMTP
Answer: A
Conceptual Explanation: Dynamic Host Configuration Protocol (DHCP) automatically
assigns IP addresses and other network configuration parameters to devices.
4. What is the primary purpose of a ‘Ping’ command in troubleshooting?
A. To encrypt a data packet
B. To increase bandwidth
C. To test connectivity between two network nodes
D. To change the MAC address
Answer: C
, Conceptual Explanation: Ping uses ICMP to check if a specific IP address is reachable and
to measure the round-trip time for messages sent.
5. Which hardware device is designed to filter incoming and outgoing network traffic based
on security rules?
A. Repeater
B. Hub
C. Firewall
D. Bridge
Answer: C
Conceptual Explanation: A firewall acts as a security barrier, monitoring and controlling
traffic based on predetermined security policies.
6. In networking, what does the term ‘Bandwidth’ refer to?
A. The maximum rate of data transfer across a path
B. The physical length of the cable
C. The number of devices connected to a router
D. The signal strength of a wireless access point
Answer: A
