TEMPS Technical Skills 1 — Questions and Answers
Question 1: Which of the following is the primary function of a router in a computer network?
- To assign IP addresses to devices
- To connect different networks and route data packets (Correct answer)
- To amplify the signal of data packets
- To provide wireless access to a network
Correct answer: To connect different networks and route data packets
A router's primary function is to connect different networks, such as your home network to the internet, and direct data traffic between them. It examines the destination IP address of data packets and uses routing tables to determine the most efficient path for them to reach their intended recipient. This ensures that information travels correctly across interconnected networks.
Question 2: Which of the following is a common method of securing a wireless network?
- Using a VPN
- Configuring MAC address filtering (Correct answer)
- Disabling firewalls
- Using HTTP instead of HTTPS
Correct answer: Configuring MAC address filtering
MAC address filtering is a security measure where a wireless access point is configured to only allow devices with specific, pre-approved Media Access Control (MAC) addresses to connect to the network. While not foolproof, it adds a layer of security by restricting network access to known and authorized devices. This helps prevent unauthorized devices from joining the network even if they have the correct password.
Question 3: What does "pinging" a network device do?
- Checks if the device is connected to a power source
- Measures the speed of data transmission
- Verifies if the device is reachable on the network (Correct answer)
- Restarts the device remotely
Correct answer: Verifies if the device is reachable on the network
Pinging a network device sends a small data packet (an ICMP echo request) to a specified IP address. If the device is online and reachable on the network, it sends back a reply (an ICMP echo reply). This process helps diagnose network connectivity issues and confirm whether a host is active and responding.
Question 4: Which of the following protocols is primarily used to securely transmit data over the web?
- HTTP
- FTP
- SSL/TLS (Correct answer)
- SNMP
Correct answer: SSL/TLS
SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) are cryptographic protocols designed to provide secure communication over a computer network. They encrypt the data exchanged between a web server and a client (like your browser), protecting sensitive information from eavesdropping and tampering. This is why secure websites use HTTPS, which is HTTP over SSL/TLS.
Question 5: What is the purpose of DNS (Domain Name System)?
- To assign email addresses to users
- To convert IP addresses into human-readable domain names (Correct answer)
- To encrypt communication between devices
- To manage data flow between devices
Correct answer: To convert IP addresses into human-readable domain names
The Domain Name System (DNS) acts like the internet's phonebook, translating human-friendly domain names (e.g., google.com) into numerical IP addresses (e.g., 172.217.160.142) that computers use to identify each other. This allows users to access websites by typing easy-to-remember names instead of complex IP addresses. Without DNS, navigating the internet would be significantly more difficult.
TEMPS Technical Skills 1
Which of the following is the primary function of a router in a computer network?