ECM 1413 Area Networks Flashcards
Intermediary Network Devices
Connects host to the network, and connects networks together
Permits or denies the flow of data
Peripherals
Don’t have logical address
Rely on their connected host to perform all network operations
WAN (Wide Area Network)
A group of LANs interconnected within a large area
TSP (Travelling Salesman) interconnects these geographical spanned networks
LAN
LAN is controlled by the ISP
LAN stands for Local Area Network
Usually spans a single geographical area
Administered by a single organization
Characterized by high data speeds
May be a single local network or interconnected local networks.
The Internet
A global mesh of interconnected networks
A global mesh of interconnected networks
A group of interrelated protocols that are necessary to perform a communication function
The 4 layers of the tcp/ip stack
Application
Transport
Network
Network Access (Link)
OSI Reference model 7 layers
Application
Presentation
Session
Transport
Network
Data Link
Physical
Application layer potential contents and protocols
HTTP, FTP, DNS, SMTP, DHCP, SSH
Transport layer potential protocols
TCP, UDP
Internet Layer potential protocols
IPv4, IPv6
Network Access Layer potential protocols
Ethernet, Token Ring, WAN protocols
Protocol Data Units and Encapsulation
- PDU is the generic term for data at each layer
- Segmentation is the process of breaking data into pieces
- Encapsulation is the process if adding control information to the data at each layer
Frame header
PDU that contains the source and the destination addresses of the frame and the control bytes
The 3 different physical transmission media and the way in which they transport PDU
Copper wires - Electrical pulses
Fiber-optic - Electrical pulses
Wireless - Electromagnetic waves
