10 Questions
What is the function of a router in a computer network?
Transfers data packets between different computer networks
Which network device uses packet switching to determine the destination device?
Switch
What is the purpose of a bridge in a computer network?
Connects two separate Ethernet network segments
What is the primary role of repeaters, hubs, and switches in a network?
Connect network devices together to function as a single segment
Which type of network cable is commonly used with RJ-45 connectors for data transmission?
Category 5 cable
Which component of a computer is used to connect it to a network?
Network Interface Card (NIC)
What is the purpose of a gateway in a network?
Control access to other networks
In the OSI Model, how many interconnected layers are there?
7
What does the TCP/IP Protocol Suite stand for?
Transmission Control Protocol/Internet Protocol Suite
What is the primary function of the physical layer in a network?
Manage the physical relation to communication structure
Study Notes
Network Hardware
- Network cables are transmission media used to transfer data between devices.
- Category 5 cable with RJ-45 connector is a commonly used network cable.
- Routers are devices that transfer data packets between different computer networks.
- Routers are used to connect a PC or LAN to a broadband internet connection and have RJ-45 ports.
- Repeaters receive a signal, regenerate it, and re-transmit it to extend signal distance.
- Hubs are multiport repeaters with several input/output ports, allowing input at any port to be available at every other port.
- Switches receive data, use packet switching to resolve the destination device, and forward data to the particular destination.
- Bridges connect two separate Ethernet network segments and forward packets from the source network to the destined network.
- Gateways connect different networks that work on different protocols and control access to other networks.
- Network Interface Cards (NICs) are components of a computer that connect it to a network.
- NICs can be internal or external network cards.
Network Software
- No specific details mentioned in the text.
Reference Models
- OSI Model is a layered networking framework that conceptualizes how communication should be done between heterogeneous systems.
- OSI Model has seven interconnected layers: physical, data link, network, transport, session, presentation, and application.
- TCP/IP Protocol Suite is a suite of protocols for communication structured in four layers: application, transport, internet, and network access.
- TCP/IP Protocol Suite can be used for communication over the internet and private networks.
Physical Layer
- Physical layer is vital for transmitting bits from one device to another.
- Physical layer manages physical and electrical details of communication, including signal acceptance.
- Functions of the physical layer include:
- Representing encoding type (how 0's and 1's are transferred to signals).
- Representing communication (bits transmitted per second).
- Handling network connection types (multipoint and point to point connections).
- Dealing with physical topologies (bus, star, ring, or mesh).
- Dealing with media bandwidth (baseband and broadband transmission).
Learn about the basic concepts, components, and physical layer of computer networks. Explore network hardware, network software, reference models, and different types of transmission media like guided and wireless.
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