Networks Flashcards
What is a Network?
A network refers to the combination of two or more devices and the interconnecting links facilitating the transmission of information among them.
This includes any setup that allows for communication and data sharing between devices.
What was the first version of the Internet?
ARPANET (1969)
ARPANET connected UCLA, Stanford (UCSB), University of California-Santa Barbara (SRI), and University of Utah.
What is LAN?
Local Area Network: A wired network within a small geographical area.
LANs are typically used in homes, schools, and small offices.
What is WLAN?
Wireless Local Area Network: A wireless network allowing device connectivity.
WLANs enable devices to connect without physical cables.
What does MAN stand for?
Metropolitan Area Network: High-speed network covering a city or region.
MANs are larger than LANs but smaller than WANs.
What is WAN?
Wide Area Network: Connects multiple LANs and MANs over large distances.
WANs can span cities, countries, or even continents.
List the types of Network Topology.
- Point to Point
- Bus
- Ring
- Star
- Mesh
- Tree
- Hybrid
Each topology has its advantages and disadvantages depending on the network design.
What is the OSI Model?
A seven-layer model defining network communication.
The layers include Physical, Data Link, Network, Transport, Session, Presentation, and Application.
What is the TCP/IP Model?
A practical framework simplifying network layers.
It consists of four layers: Link, Internet, Transport, and Application.
What hardware is commonly used in networks?
- Modems
- Hubs, Bridges, and Switches
- Routers
- Network Interface Cards (NIC)
- Network Cables
- Firewalls
Each device plays a specific role in facilitating network communication.
What are protocols in network software?
Rules governing data transmission.
Protocols ensure that devices communicate effectively and consistently.
What is IP Addressing?
IPv4 (32-bit) and IPv6 (128-bit) addressing.
IP addressing is essential for identifying devices on a network.
What is the purpose of the Domain Name System (DNS)?
Converts domain names to IP addresses.
DNS makes it easier for users to access websites without memorizing numerical IP addresses.
What is a Firewall?
Security applications monitoring network traffic.
Firewalls protect networks from unauthorized access and threats.
What are Proxy Servers?
Intermediaries improving security and performance.
They can cache data and filter requests for enhanced network efficiency.
What does VPN stand for?
Virtual Private Network: Securely extends private networks over public infrastructure.
VPNs encrypt data and provide secure access to remote users.
List 3 Protocols in the Application phase of the TCP/Ip model
DNS, HTTP, SSH
What is the equivalent of the Apllication layer of the TCP/IP model in the OSI Model?
Application, Presentation, Session
What protocols are used in the Transport phase of both models
TCP/UDP
What protocols are used in the Network phase of both models
IPV4, IPV6, ICMP, ARP, IGMP
What is the equivalent of Network interphase phase of the TCP/Model in the OSI Model?
Data Link And Physical
Each connection is established between a specific pair of processes, allowing direct communication between the client and the server.
Point-to-Point Communication
Full-Duplex Communication:
Data can flow in both directions simultaneously on the same connection, enabling
efficient two-way communication between the client and server.
Comunication - Components
Socket
a unique combination of an IP address and a port number that identifies one end of a connection
