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Questions and Answers
What is the primary function of a router?
What is the primary function of a router?
- To filter incoming and outgoing network traffic
- To connect a single device to a network
- To connect multiple networks and route data between them (correct)
- To verify the identity of devices on a network
What is the primary difference between a router and a gateway?
What is the primary difference between a router and a gateway?
- There is no difference between a router and a gateway (correct)
- A router is used for wireless networks, while a gateway is used for wired networks
- A router connects multiple devices, while a gateway connects multiple networks
- A router connects multiple networks, while a gateway connects multiple devices
What is the primary purpose of authentication in a network?
What is the primary purpose of authentication in a network?
- To control access to network resources
- To encrypt data transmitted over the network
- To verify the identity of devices or users on a network (correct)
- To filter incoming and outgoing network traffic
What is the primary purpose of a firewall in a network?
What is the primary purpose of a firewall in a network?
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What is the primary purpose of encryption in a network?
What is the primary purpose of encryption in a network?
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Study Notes
Computer Networks
Network Topologies
- Physical Topology: The physical layout of devices and connections in a network.
- Examples: bus, star, ring, mesh, tree
- Logical Topology: The way data is transmitted through the network.
- Examples: broadcast, unicast, multicast
Network Types
- LAN (Local Area Network): A network that spans a small geographic area (e.g., home, office building).
- WAN (Wide Area Network): A network that spans a large geographic area (e.g., city, country).
- WLAN (Wireless Local Area Network): A LAN that uses wireless communication.
- MAN (Metropolitan Area Network): A network that spans a metropolitan area.
- WAN (Wide Area Network): A network that spans a large geographic area.
Network Protocols
- TCP/IP (Transmission Control Protocol/Internet Protocol): The most widely used protocol suite.
- TCP (Transmission Control Protocol): A transport-layer protocol that ensures reliable data transfer.
- IP (Internet Protocol): A network-layer protocol that routes data packets.
- HTTP (Hypertext Transfer Protocol): An application-layer protocol for transferring data over the web.
- FTP (File Transfer Protocol): An application-layer protocol for transferring files.
Network Devices
- Hub: A simple network device that broadcasts incoming data to all connected devices.
- Switch: A network device that forwards incoming data to specific devices based on MAC addresses.
- Router: A network device that connects multiple networks and routes data between them.
- Gateway: A network device that connects multiple networks and routes data between them.
Network Architectures
- Client-Server Architecture: A network architecture where clients request resources from a central server.
- Peer-to-Peer Architecture: A network architecture where devices act as both clients and servers.
Network Security
- Firewall: A network device that filters incoming and outgoing traffic based on security rules.
- Encryption: The process of converting plaintext data into unreadable ciphertext.
- Authentication: The process of verifying the identity of devices or users on a network.
- Authorization: The process of controlling access to network resources based on user identity.
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