Self-Test Vol. 1 Unit 4 Flashcards
Into what two groups can you divide the OSI model?
Application and Transport
What is the responsibility of the Data Transport layers of the OSI model?
Define how data travels, the physical media, through internetwork devices, to the destination computer, and to the application on the destination machine.
This layer divides into two sub layers: LLC and MAC.
Data Link
This layer typically includes multiplexing, virtual circuit management, and error checking and recovery.
Transport
This layer defines the electrical, mechanical, procedural, and functional specifications for network communications.
Physical
A hub operates at this layer.
Physical
Switches and bridges operate at this level.
Data Link
This layer provides a variety of coding and conversion functions that are applied to application layer data.
Presentation
A router operates at this layer.
Network
This layer establishes, manages, and terminates communication sessions.
Session
At this layer, common data compression and encryption schemes are used.
Presentation
Describe the DISN.
A telecommunications network that provides the exchange of information in an interoperable and global space, divided by security demands, transmission requirements, and geographic needs of targeted end-user customers.
What unclassified IP data service provides internet connectivity and supports e-mail and web services?
SBU IP Data
List the key features of VoSIP.
Providing an interface between the IP telephony and the circuit-switched net, a full range of supplemental user features, a seperate IP address space, firewalls at each VoSIP site and access control lists on all routers to ensure only permitted traffic flows, secure voice communications up to and including Secret.
What service uses a number of different satellite services to provide warfighters with worldwide access and GIG connectivity for diversity, redundancy and availability?
Commercial Satellite Service
Transport protocols have two classifications based on the way data transports, name the two classifications.
Connection and connectionless oriented
What must occur between ends before transfer of information in a connection-oriented environment?
Connection between sender and recipient happens prior.
Define buffering.
Network devices temporarily stores bursts of excess data in memory until the receiving machine utilizes it.
The easiest way to break down the many protocols of the TCP/IP suite is according to where they operate within the OSI model. Each protocol in this stack operates at one of what four layers?
Data link, network, transport, or application layer.
The protocols at the Data Link layer define the access method for the media, the architecture, and interface with the Physical layer of the network. What standards are these protocols based on?
Project 802 standards.
