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57 Cards in this Set
- Front
- Back
At what layers do gateways function?
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the Transport layer and above
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What layer provides network access for applications?
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the Application layer
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What layer provides flow control?
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the Transport layer
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What layer establishes the availability of other computers on the network?
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the Application layer
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What layer determines if sufficient resources exist for communication to occur between two computers?
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the Application layer
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What layer does SMTP function at?
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the Application layer
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What layer does FTP function at?
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the Application layer
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What layer does SNMP function at?
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the Application layer
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What layer does Telnet function at?
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the Application layer
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what layer does Appletalk function at?
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the Application layer
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What layer performs protocol conversion?
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the Presentation layer
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What layer performs encryption?
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the Presentation layer
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What layer performs compression?
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the Presentation layer
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What layer synchronizes computers involved in a communication?
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the Session layer
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What layer handles connection establishment, data transfer, and connection release?
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the Session layer
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What layer does NetBIOS function at?
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the Session layer
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What layer repackages messages into smaller formats?
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the Transport layer
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What layer provides error-free delivery and error handling functions?
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the Transport layer
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What layers does NetBEUI function at?
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the Transport and Network layers
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What layer does TCP function at?
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the Transport layer
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What layer does SPX function at?
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the Transport layer
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What layers does NWLink function at?
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the Transport and Network layers
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What layer handles logical addressing?
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the Network layer
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What layer handles routing?
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the Network layer
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What layer handles traffic management?
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the Network layer
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What layer does IP function at?
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the Network layer
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What layer does IPX function at?
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the Network layer
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What devices function at the Network layer?
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rounters and brouters
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What layer packages raw bits into frames?
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the Data Link layer
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What is the purpose of packaging raw bits into frames?
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they are transmittable across a network
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What layer includes a Cyclical Redundancy Check (CRC)?
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the Data Link layer
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What are the two sublayers of the Data Link layer?
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the Logical Link Control (LLC) and the MAC sublayers
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What does the LLC sublayer use to create links for the MAC sublayer?
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Destination Service Access Points and Source Service Access Points
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What devices function at the Data Link layer?
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switches, bridges, and brouters
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What devices function at the Physical layer?
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multiplexers and repeaters
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How many bits are in a MAC address?
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48 bits
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What protocol is used to map MAC addresses to IP addresses?
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ARP
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What OSI layer is responsible for formatting data as the application layer is expecting? |
the Presentation layer |
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What do routed and routing protocols do? |
Routed protocols: logical addressing and forwarding |
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What type of protocol is responsible for logical addressing and forwarding? |
Routed protocols |
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What type of protocol is responsible for path determination? |
Routing protocols |
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What OSI layer is responsible for managing data within a local (non-routed) network by physical address? |
Data Link layer |
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What OSI layer is responsible for putting data on the physical medium? |
Physical layer |
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What is data encapsulation? |
At each layer, the data from the previous layer is encapsulated with the layer's header |
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What OSI layer adds a trailer to the PDU? |
Data Link Layer |
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What OSI layer does Telnet operate at? |
Application layer |
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What OSI layer does HTTP operate at? |
Application layer |
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What OSI layer does FTP operate at? |
Application layer |
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What OSI layer does SMTP operate at? |
Application layer |
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What OSI layer does TFTP operate at? |
Application layer |
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What OSI layer does DNS operate at? |
Application layer |
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What OSI layer does DHCP operate at? |
Application layer |
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What OSI layer does TCP operate at? |
Transport layer |
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What OSI layer does UDP operate at? |
Transport layer |
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What is the range of "common ports"? |
1-1024 |
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What port does the communication source use? |
a random port above 1024 |
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What 3 parts make up a socket? |
IP address + protocol (TCP or UDP) + port number |