Module 0: Review of Networking Concepts Flashcards
What are the basic building blocks of networks topologies?
- Nodes (Hosts, mobile devices and routers)
- Links (Coaxial cable, unshielded twisted)
What are the 7 topologies?
- Two-node point-to-point
- Linear topology
- Bus topology
- Ring topology
- Dual ring topology
- Star topology
- Mesh topology
What is the two-node topology?
- Two nodes connected by one link.
- Can serve as a building block for other topologies
What is the linear topology?
- Multiple point-to-point connections in linear fashion.
What are the problems with a linear topology?
- Data transfer nodes may need to go through other nodes
- Poor fault tolerance
- Link bandwidth may not be well utilized
What is the bus topology?
- Linear topology, but all nodes share a single link.
What is a problem with the bus topology?
- Transmission may collide
What is the ring topology?
- Multiple nodes share a single link connected as a ring
- Orderly transmission without collisions via token passing mechanisms
What is the dual ring topology?
- Two counter rotating rings
What is the start topology?
- Multiple nodes connected to a single central hub. Hub is like a collapsed bus.
- Example: LANs
What is the mesh topology?
- Multiple point-to-point links connected in an arbitrary topology.
- Full mesh: every node is directly interconnected
- Partial mesh: not necessarily directly interconnected
What are the two problems for building a large network? What is the solution?
- Limited capacity (#nodes, links and length of links)
- Interconnectivity (topologies)
Interconnection devices: repeaters, hubs, switches, bridges, routers, gateways
What are the levels of the TCP/IP stack?
Application Transport Network Data Link Physical
What level is TCP/IP level are HTTP, FTP and SSH?
Application
What level is TCP/IP level are TCP and UDP?
Transport
