Various questions about OSI
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| APPLICATION PROTOCOLS | NNTP · SIP · SSI · DNS · FTP · Gopher · HTTP · NFS · NTP · SMPP · SMTP · DHCP · SNMP · Telnet · Netconf
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| Provides an interface between the communications software and any applications that need to communicate outside the computer on which the application resides. It also defines processes for user authentication. | Layer 7
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| This layer’s main purpose is to define and negotiate data formats, such as ASCII text, EBCDIC text, binary, BCD, and JPEG. Encryption also is defined by OSI as a presentation layer service. | Layer 6
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| Which layer provides a set of interfaces for applications to obtain access to network services? | Application
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| This layer handles general network access, movement of data and error recovery for applications. | Application
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| An example of software that resides at this layer include FTP, HTTP as well as client software such as Novell's client. | Layer 7
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| This layer handles data format information for network communications. | Presentation
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| This layer converts data into a generic format that can survive the rigors of transmission. | Layer 6
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| This layer can handle protocol conversion, data encryption or decryption, character set issues and graphics commands. | Presentation
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| A redirector that intercepts requests for service from the computer and sends them to the network for servicing operates at this layer | Presentation
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| An example of functionality at this layer would be a Web browser displaying graphic files embedded in a Web page. | Presentation
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| This layer can handle character conversion such as a carriage return in different systems such as PC, Linux and Unix. | Layer 6
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| This layer is what permits two parties to hold ongoing communications. | Layer 5
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| This layer handles session setup, data or message exchanges and teardown when the session ends. | Layer 5
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| Some of the network functions handled by this layer include name lookup and user login and logout. | Layer 5
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| Domain Name System resolution and NetBIOS name resolution operate at this layer. | Layer 5
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| This layer manages the mechanics of an ongoing communication including identifying which side may transmit data when and for how long. | Layer 5
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| This layer provides synchronization services between tasks on both ends of a connection. | Layer 5
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| This layer manages the conveyance of data and flow control. | Layer 4
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| This layer segments long data payloads into chunks that match the maximum packet size for the network medium. | Layer 4
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| This layer makes sure that the recipient of transmitted data is not overwhelmed with more data than it can handle. | Layer 4
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| The components that work at this layer include the TCP portion of TCP/IP and the SPX portion of IPX/SPX. | Layer 4
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| This layer handles addressing messages for delivery. | Layer 3
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| This layer translates logical network addresses into their physical counterparts. | Layer 3
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| This layer decides how to route transmissions from sender to receiver. | Layer 3
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| This layer is considered the traffic cop for network activity because it handles packet switching, data routing, and congestion control. | Layer 3
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| Routers operate at this layer. | Layer 3
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| This layer handles delivery of frames from sender to receiver through the Physical layer. | Layer 2
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| The NIC driver operates at this layer. | Layer 2
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| This layer is responsible for detecting errors in the transmission of frames. | Layer 2
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| The hardware that operate at this layer are NIC cards and switches. | Layer 2
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| This layer is responsible for converting bits into signals for outgoing messages. | Layer 1
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| This layer manages the computer's interface to the network medium. | Layer 1
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| This layer is where specification of all details for creating a network connection occur. | Layer 1
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| The components working at this layer include all of the cables and connectors used on the medium, plus repeaters and hubs. | Layer 1
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| This layer encodes ones and zeros, the timing and interpretation of signals sent across the medium. | Layer 1
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| This layer usually provides services such as email, web browsing, and file transer services. | Layer 7
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| This layer uses FTP, SNMP and POP3. | Layer 7
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| Multimedia layer | Presentation Layer
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| MP4, JPEG, GIF on this layer | Layer 6
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| Encryption, decryption, and data compression take place at this layer | Layer 6
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| The role of this layer is to setup, manager, and terminate sessions or dialogues between devies | Layer 5
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| SQL, RPC, and NFS all work at the... | Layer 5
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| Layer 1 | Physical
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| Layer 2 | Data Link
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| Layer 2A | Data Link - MAC
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| Layer 2B | Data Link - LLC
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| Layer 3 | Network
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| Layer 4 | Transport
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| Layer 5 | Session
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| Layer 6 | Presentation
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| Layer 7 | Application
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