Computer Networks: Network Architectures and Servers

Play an AI-generated podcast conversation about this lesson

What is the primary function of a physical connection in computer networks?

To provide power to network devices
To establish a wireless connection
To connect devices to the internet
To transmit data between devices (correct)

Which type of cable is commonly used in modern LAN computer networks?

Twisted-pair cable (correct)
Fiber-optic cable
Coaxial cable
Wireless cable

What is the primary function of a server computer in a network?

To act as a bridge between different networks
To request and receive data from client computers
To provide services and resources to client computers (correct)
To control the internet connection

What is the primary advantage of fiber-optic cables over coaxial cables?

Longer transmission capacity (B) Signup and view all the answers

What is the main difference between 2.4 GHz and 5 GHz Wi-Fi frequencies?

Range of the signal (A) Signup and view all the answers

In a peer-to-peer network, what is the role of each node?

Both a client and a server (B) Signup and view all the answers

What is a characteristic of a peer-to-peer network?

It allows users to control their own data and resources (A) Signup and view all the answers

What is the purpose of cladding in an optical fiber?

To confine the light within the core (A) Signup and view all the answers

What is the main advantage of twisted-pair cables over coaxial cables?

Cost-effectiveness and ease of installation (A) Signup and view all the answers

What is the main difference between a client-server network and a peer-to-peer network?

The distinction between clients and servers (B) Signup and view all the answers

What is a local area network (LAN) classified as?

A type of computer network (D) Signup and view all the answers

What is the main purpose of a network architecture?

To allocate tasks and organize computers (B) Signup and view all the answers

What is the primary function of a modem?

To translate digital signals into analog signals for transmission (D) Signup and view all the answers

What is the purpose of a router in a home network?

To connect multiple devices to the internet and route data packets between them (A) Signup and view all the answers

What is the term for the small chunks of data that are transmitted over the internet?

Packets (D) Signup and view all the answers

What is the purpose of the preamble in an Ethernet packet?

To synchronize the network nodes and indicate the start of the packet (C) Signup and view all the answers

What is a wireless access point (WAP) used for?

To broadcast a wireless signal for devices to connect to a network (D) Signup and view all the answers

What is the purpose of the CRC (Cyclical Redundancy Check) in an Ethernet packet?

To provide error-checking information for the packet (C) Signup and view all the answers

What is the purpose of a probe request in Wi-Fi networks?

To identify itself and ask if any other Wi-Fi devices are within range (B) Signup and view all the answers

What is the function of the Link Manager in Bluetooth technology?

To manage connections and interactions between devices (D) Signup and view all the answers

What is the typical range of Bluetooth technology?

Up to 10 meters (C) Signup and view all the answers

What happens when a router receives a packet from the Internet?

It strips off an encrypted and addressed outer shell (C) Signup and view all the answers

What is the primary purpose of an access point in a Wi-Fi network?

To provide wireless access to a network (D) Signup and view all the answers

What is the term for a physical location where devices can access a Wi-Fi network?

Hotspot (D) Signup and view all the answers

What is the primary function of the Link Manager (LM) in Bluetooth devices?

To manage device discovery and optimize power usage (C) Signup and view all the answers

What is the purpose of the Standby (Sniff) Mode in Bluetooth devices?

To conserve power while remaining available for potential connections (A) Signup and view all the answers

What is the main difference between active and passive NFC devices?

Active NFC devices can both send and receive information, while passive NFC devices can only transmit data (D) Signup and view all the answers

What is the primary function of the Inquiry Mode in Bluetooth devices?

To transmit an inquiry on all hop frequencies to discover available devices (C) Signup and view all the answers

What is the main advantage of NFC over Bluetooth?

NFC is more suitable for short-distance communication (D) Signup and view all the answers

What is the primary function of the Page Mode in Bluetooth devices?

To establish a connection with a specific device (B) Signup and view all the answers

What is an example of an NFC application?

Mobile payments (C) Signup and view all the answers

What is a security measure taken to protect NFC communications?

Sending data through secure channels and encrypting it (D) Signup and view all the answers

What can NFC be used for in a concert or theatre?

Ticket redemption (C) Signup and view all the answers

What is another use of NFC apart from mobile payments?

Unlocking car doors (D) Signup and view all the answers

Why is encryption necessary for NFC communications?

To prevent data being intercepted by other devices (C) Signup and view all the answers