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42 Cards in this Set
- Front
- Back
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Which of the following protocols are examples of TCP/IP transport layer protocols?
a. Ethernet b. HTTP c. IP d. UDP e. SMTP f. TCP |
d. UDP
f. TCP |
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Which of the following Protocols are examples of TCP/IP network access layer protocols?
a. Ethernet b. HTTP c. IP d. UDP e. SMTP f. TCP g. PPP |
a. Ethernet
g. PPP |
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The process of HTTP asking TCP to send some data and make sure that it is received correctly is an example of what?
a. Same-layer interaction b. Adjacent-layer interaction c. The OSI model d. All the other answers are correct. |
b. Adjacent-layer interaction occurs on one computer, with tow adjacent layers in the model. The higher layers requests services from the next lower layer, and the lower layer provides the services to next higher layer.
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The process of TCP on one computer marking a segment as segment 1, and the receiving computer then acknowledging the receipt of segment 1, is an example of what?
a. Data encapsulation b. Same-layer interaction c. Adjacent-layer interaction d. The OSI model e. None of these answers are correct. |
b. Same-layer interaction occurs on multiple computers. The functions defined by that layer typically need to be accomplished by multiple computers for-example the sender setting a sequence number for a segment, and the receiver acknowledging receipt of that segment. A single layer defines that process, but the implementation of that layer on multiple devices is required to accomplish the function.
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The process of a web server adding a TCP header to a web page, followed by adding an IP header, and then a data link header and trailer is an example of what?
a. Data encapsulation b. Same-layer interaction c. The OSI model d. All these answers are correct. |
Encapsulation is defined as the process of adding a header infront of data suplied by a higher layer (and possibly adding a trailer as well).
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Which of the following terms is used specifically to identify the entity that is created when encapsulating data inside data link layer headers and trailers?
a. Data b. Chunck c. Segment d. Frame e. Packet f. None of these - there is no encapsulation by the data link layer. |
d. Frame
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Which OSI layer defines the functions of logical network-wide addressing and routing?
a. Layer 1 b. Layer 2 c. Layer 3 d. Layer 4 e. Layer 5 f. Layer 6 g. Layer 7 |
c. Layer 3
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Which OSI layer defines the standards for cabling and connectors?
a. Layer 1 b. Layer 2 c. Layer 3 d. Layer 4 e. Layer 5 f. Layer 6 g. Layer 7 |
a. Layer 1
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Which OSI layer defines the standards for data formats and encryption?
a. Layer 1 b. Layer 2 c. Layer 3 d. Layer 4 e. Layer 5 f. Layer 6 g. Layer 7 |
f. Layer 6
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Which of the following terms are not valid terms for the names of the seven OSI layers ?
a. Application b. Data link c. Transmission d. Presentation e. Internet f. Session |
c.Transmission and e. Internet. OSI includes the transport layer (not transmission layer) and the network layer (not internet layer).
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TCP/IP Model includes the following layers.
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Application
Transport Internet Network access |
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TCP/IP Architecture layer: Application
What are some example protocols? |
HTTP, POP3, SMTP
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TCP/IP Architecture layer: Transport
What are some example protocols? |
TCP, UDP
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TCP/IP Architecture layer: Internet
What are some example protocols? |
IP
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TCP/IP Architecture layer: Network access
What are some example protocols? |
Ethernet, Frame Relay
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The TCP/IP application layer provide?
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It provide services to the application software running on a computer. It defines services that applications need. It provides an interface between software and network itself.
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How does same-layer interaction work?
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When 2 computers want to communicate on the same layer, the computers use headers to hold the information they want to communicate. Headers are what is transmitted between the 2 computers.
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How does adjacent layer interaction work.
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One layer provides a service to a higher layer. The the higher layer requests (hardware/software) that the next lower layer preform the needed function.
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TCP/IP Internet layer
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Is defined by the IP. The IP defines addresses so that each host comp can have a different IP address. IP header includes a source & destination.
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IP address
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IP addresses allow TCP/IP speaking devices to have an address with which to communicate. IP defines routing, the process of how a router should forward, route, packets of data.
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TCP/IP Network Access Layer
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Layer defines how to physically connect to a host computer to physical media over which data can be transmitted. Ex: Ethernet, connectors, cables, volt levels, PPP.
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TCP/IP Network access layer includes:
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Protocols, cabling standards, headers, and trailers that define how to send data across a variety of physical networks.
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Name the 5 steps of encapsulation.
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1. Create and encapsulate the application data with any required application layer headers.
2. Encapsulate the data supplied by the application layer inside a transport layer header. 3. Encapsulate the data supplied by the transport layer inside an internet layer (IP) header. 4. Encapsulate the data supplied by the internet layer inside a network access layer header and trailer. 5. Transmit the bits. |
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OSI VS TCP/IP
TCP/IP include which of the following OSI layers? |
Layer 7 Application
Layer 6 Presentation Layer 5 Session |
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OSI VS TC/IP
OSI layers 7 - 5 are categorized in TCP/IP as? |
The TCP/IP Application Layer
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OSI VS TCP/IP
Which two layers in the TCP/IP Layer stack are almost same in the OSI model? |
Transport layer 4 OSI is the same as transport layer 3 in the TCP.
The Nework layer 3 OSI is relates to the Internet layer 2 in the TCP/IP model. |
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OSI VS TCP/IP
The Data link layer and physical layer are the same as ________ in the TCP/IP model. |
The Network access level includes layers 1 and 2 data link and physical layers.
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OSI model
Name the layers from top to bottom |
layer 7 Application layer
layer 6 Presentation layer layer 5 Session layer layer 4 Transport layer layer 3 Network layer layer 2 Data link layer layer 1 Physical |
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OSI model
Name the layers from bottom to top |
Layer 1 Physical
Layer 2 Data link Layer 3 Network Layer 4 Transport Layer 5 Session Layer 6 Presentation Layer 7 Application |
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OSI Model
What does layer 1 do? |
Layer 1 (physical) deals with standards the physical characteristics. Transmission of medium, connectors, pins, use of pins, electrical currents, encoding, light modulation and rules for activating and deactivating the physical medium.
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OSI model
What is the function of layer 2. |
Layer 2 (data link layer) Defines the rules (protocols) that determine when a device can send data over a particular medium. Defines the format of a header and trailer, which follows the encapsulated data, typically defines a frame check sequence, (FCS) field, which allows the receiving device to detect errors.
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OSI model
What defines the network layer? |
It has three main features: logical addressing, routing (forwarding), and path determination. The routing concepts define how devices *typically forward packets to their destination. Logical addressing defines how each device can have an address that can be used by the routing process. Path determination refers to the work don by routing protocols by which all possible routes are learned, but the best route is chosen.
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OSI model
How does layer 4 work? |
Layer 4 (Transport layer) Provide a large number of services, it focuses on data delivery to another computer. Ex: error recovery and flow control.
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OSI model
What defines the layer 5? |
The session layer 5 defines how to start, control and end conversations (called sessions). This includes the control and management of multiple bidirectional messages so that the application can be notified if only some of a series of messages are completed. This allows the presentation layer to have a seamless view of an incoming stream of data.
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OSI model
How does layer 6 work? |
layer 6 the presentation layer 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.
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OSI model
What defines layer 7? |
Layer 7 the application layer 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 authentication.
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The physical (layer 1)
Devices, protocols and Specifications. |
Protocols and Specifications
RJ-45, EIA/TIA-232, V.35, Ethernet (IEEE 802.3) Devices LAN hub, repeater |
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Data link (layer 2)
Devices, protocols and Specifications. |
Protocols and Specifications
Ethernet (IEEE 802.3), HDLC, Frame Relay, PPP Devices LAN switch, wireless access point, cable modem, DSL modem. |
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Network (layer 3)
Devices, protocols and Specifications. |
Protocols and Specifications
IP Devices Router |
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Transport (layer 4)
Devices, protocols and Specifications. |
Protocols and Specifications
TCP, UDP |
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Session (layer 7), Presentation (layer 6), and Application (layer 5).
Devices, protocols and Specifications. |
Protocols and Specifications
Telnet, HTTP, FTP, SMTP, POP3, VoIP, SNMP |
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What are the OSI layering concepts and benefits.
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Less complex - breaking the concepts into smaller parts.
Standard interfaces - The standards allow for multiple venders to create products and allow open competition. Easier to learn - Easily discuss and learn about details of protocol specifications. Easier to develop - Reduce complexity,program changes and faster product development. Multivender interoperability - Gear from multiple vendors can work in the same network. Modular engineering - Venders can write software that implements the lower layers. |
