CCST Networking Fundamentals 2 — Questions and Answers
Question 1: Which layer of the OSI model is responsible for logical addressing and routing packets between networks?
- Data Link
- Transport
- Network (Correct answer)
- Session
Correct answer: Network
The Network layer (Layer 3) handles logical addressing (IP) and determines the best path for routing packets across networks.
Question 2: A technician needs to find the MAC address of a Windows PC. Which command should they use?
- ipconfig /all (Correct answer)
- netstat -a
- tracert
- ping 127.0.0.1
Correct answer: ipconfig /all
The 'ipconfig /all' command displays detailed network adapter information including the physical (MAC) address.
Question 3: What is the default subnet mask for a Class B IP address?
- 255.0.0.0
- 255.255.0.0 (Correct answer)
- 255.255.255.0
- 255.255.255.128
Correct answer: 255.255.0.0
Class B addresses use a default subnet mask of 255.255.0.0, covering the range 128.0.0.0 to 191.255.255.255.
Question 4: Which protocol automatically assigns IP addresses to devices on a network?
- DNS
- FTP
- DHCP (Correct answer)
- SMTP
Correct answer: DHCP
DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP addresses, subnet masks, gateways, and DNS servers to network clients.
Question 5: What does the acronym 'LAN' stand for?
- Large Area Network
- Local Area Network (Correct answer)
- Linked Access Node
- Logical Address Node
Correct answer: Local Area Network
LAN stands for Local Area Network, referring to a network that covers a small geographic area such as a building or campus.
Question 6: At which OSI layer do switches primarily operate?
- Layer 1 - Physical
- Layer 2 - Data Link (Correct answer)
- Layer 3 - Network
- Layer 4 - Transport
Correct answer: Layer 2 - Data Link
Standard switches operate at Layer 2 (Data Link) and forward frames based on MAC addresses in their CAM table.
Question 7: Which IPv4 address range is reserved for loopback testing?
- 10.0.0.0/8
- 169.254.0.0/16
- 127.0.0.0/8 (Correct answer)
- 192.168.0.0/16
Correct answer: 127.0.0.0/8
The 127.0.0.0/8 range is reserved for loopback; pinging 127.0.0.1 tests the local TCP/IP stack without sending traffic to the network.
CCST Networking Fundamentals 2
Which layer of the OSI model is responsible for logical addressing and routing packets between networks?