Exam Solution Manual for Computer Networking IT1080 Already Passed

Exam Solution Manual for Computer Networking IT1080 Already Passed The Protocol Data Unit (PDU) at the Physical layer is called - Answers Byte A byte is defined as - Answers 8 bits Why are computers based on a binary numbering system? - Answers Computers only understand two states such as "high/low" or "true/false" Each character in hexadecimal represents 8 bits in binary. - Answers False, Each hexadecimal character represents 4 bits in binary The Protocol Data Unit (PDU) at the Network Interface layer is called - Answers Frame Which portion of a packet contains layer-specific information needed to accurately process the packet? - Answers Header TCP/IP: name of Layer 1. - Answers Physical TCP/IP: name of Layer 2. - Answers Network Interface TCP/IP: name of Layer 3. - Answers Internet TCP/IP: name of Layer 4. - Answers Transport TCP/IP: name of Layer 5. - Answers Application The Protocol Data Unit (PDU) at the Transport layer is called - Answers Segment Which layer of the TCP/IP model is responsible for routing packets across networks? - Answers Internet The Protocol Data Unit (PDU) at the Application layer is called - Answers Data Data created at the Application layer is passed through the Transport, Internet, and Network Interface layer where header information is added. The information then is presented to the Physical layer where it it converted into signals to be sent across then network. This process is called - Answers Encapsulation Which layer of the TCP/IP model is responsible for connecting devices on the same network? - Answers Network Interface The transport layer uses what type of unique identifiers to provide application to applications communication? - Answers Port numbers Which Internet stream service operates similar to a telephone call? - Answers Connection-oriented In a message transport model in the Internet, each message delivered will never be - Answers combined with multiple messages The stream transport model in the Internet refers to - Answers a sequence of bytes flowing from one application program to another The Internet communication stream paradigm can run over TCP or UDP. - Answers False A concurrent server uses threads of control to handle requests from multiple clients at the same time. - Answers True A packet using the message paradigm is limited to 64 K bytes per message. - Answers True Which two Internet protocols allow a client to identify a server? - Answers IP address and port number Peer-to-peer service is implemented as one way to avoid creating a central bottleneck in network connections. Peer-to-peer architecture is defined as - Answers data distributed equally among a set a server and each client request is sent to the appropriate server. Describe the client-server model of interaction. - Answers The server starts first and awaits contact by the client. The server must be running before the client can make contact. - Answers True What is Domain Name System (DNS)? - Answers It is a service that maps human-readable symbolic names to computer addresses. The purpose of Name Resolution is to - Answers translate a domain name into an address. The HTTP request type _______ is used to request a document. - Answers GET HyperText Markup Language (HTML) is a representation protocol standard that specifies the syntax for a web page. - Answers True Select the two purposes of version information in HTTP? - Answers Allows servers to choose highest version that is understood by both sender and receiver. Permits protocol to change and still preserve backwards compatibility. The HTTP request type ______ is used to send data to a server where it replaces a specific item. - Answers PUT Simple Mail Transfer Protocol (SMTP) can only transfer text messages. - Answers True Which of the following does not describe a characteristics of HTML? - Answers HTML is a programming language used to write web pages. A browser can reduce download times significantly by saving a copy of each image in a cache on the user's disk and using the cached copy. - Answers True The Simple Mail Transfer Protocol (SMTP) is the standard protocol that - Answers a mail transfer program uses to move a copy of an email from one computer to another. Why does light travel around a bend in an optical fiber? - Answers Light reflects when the angle of incidence is greater than the critical angle. In point-to-point communications, laser beams have the advantage of being suitable for use outdoors and can span greater distances than infrared. - Answers True The most widely used form of light energy medium is fiber optics. - Answers True Low Earth Orbit Satellites are defined as orbiting up to 2000 Kilometres, having a short propagation delay, and easy to track. - Answers False Two broad classes are used to distinguish between physical media (such as copper wiring or optical fibers) that provide a specific path and radio transmissions that travel in all directions through space. These terms are _______ and ______. - Answers guided, unguided One way to reduce interference from noise is to place metal between a source of noise and the communicating medium. - Answers True Optical fiber has several properties that make it more desirable than copper wiring. These advantages include all except - Answers lower overall cost Medium Earth Orbit (MEO) Satellites provide communication at the North and South Poles - Answers True Random electromagnetic radiation is called - Answers noise Which of the following is a media that does not use light energy to carry information? - Answers Radio waves Which is the correct form for creating a hyperlink in HTML? - Answers <a href= "" > University of Cincinnati</a> What does HTML stand for? - Answers Hypertext Markup Language Which organization is responsible for the Web standards? - Answers The World Wide Web Consortium Select the correct tag for the largest header in HTML. - Answers <h1> Which is the correct HTML tag for inserting a line break? - Answers <br>