Telecommunications Network Fundamentals 2 — Questions and Answers
Question 1: What is the purpose of a subnet mask?
- Encrypt network traffic
- Identify the network and host portions of an IP address (Correct answer)
- Assign MAC addresses
- Control bandwidth
Correct answer: Identify the network and host portions of an IP address
A subnet mask separates the network portion from the host portion of an IP address to enable proper routing.
Question 2: Which protocol operates at the Transport layer and provides reliable, connection-oriented delivery?
- UDP
- IP
- TCP (Correct answer)
- ICMP
Correct answer: TCP
TCP (Transmission Control Protocol) provides reliable, ordered, and error-checked delivery of data.
Question 3: What is the default port number for HTTPS?
- 80
- 21
- 443 (Correct answer)
- 8080
Correct answer: 443
HTTPS uses port 443 by default for encrypted web communications over TLS/SSL.
Question 4: What technology allows multiple devices to share a single public IP address?
- DNS
- DHCP
- NAT (Correct answer)
- VLAN
Correct answer: NAT
NAT (Network Address Translation) maps multiple private IP addresses to a single public IP address.
Question 5: What does DNS resolve?
- MAC addresses to IP addresses
- Domain names to IP addresses (Correct answer)
- IP addresses to port numbers
- VLANs to subnets
Correct answer: Domain names to IP addresses
DNS (Domain Name System) translates human-readable domain names into numerical IP addresses.
Question 6: What is the function of ARP in a network?
- Assign IP addresses dynamically
- Resolve IP addresses to MAC addresses (Correct answer)
- Route packets between subnets
- Encrypt Layer 2 frames
Correct answer: Resolve IP addresses to MAC addresses
ARP (Address Resolution Protocol) maps a known IP address to its corresponding MAC address on a local network.
Telecommunications Network Fundamentals 2
What is the purpose of a subnet mask?