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Data Communications and Networking 1

Showing 226-271 of 271 answers

Which of the following elements do both human and computer communication systems have in common? (Choose three.)
  • · Channel · Source · Receiver Correct
Which of the following is a protocol used in physical layer?
  • Infrared Data Association
  • Ethernet
  • All of the above Correct
  • USB
Which of the following is not a service of Physical Later?
  • It converts a signal from one form to another so that it can be physically transmitted over a communication channel
  • It is concerned with the transmission of messages on a single local network Correct
  • Line coding that shows data how transmission is done by hardware devices that are converted for digital transmissions
Which of the following is NOT an application that uses a Network?
  • Games
  • Databases
  • Stand-alone application Correct
  • FTP
Which of the following OSI model layers have the same functionality as the network access layer in the TCP/IP model? (Choose two.)
  • Data link Physical Correct
Which of the following statement is CORRECT?
  • Both Physical and Data layer determines the frame synchronizations
  • Both Physical and Data layer uses protocol to describe the mechanical, electrical, functional and procedural means to activate, maintain and deactivate physical connections for a bit
  • The physical layer is concerned with bit by bit delivery and Data layer is concerned with signal equalization
  • The physical layer converts a signal from one form to another so that it can be physically transmitted over a communication channel and the data layer is concerned with the transmission of messages on a single local network Correct
Which of the following statement is INCORRECT?
  • The TCIP/IP Model is mapped to the OSI Model
  • OSI lost out to TCP/IP as the protocol suite of the Internet
  • The TCP/IP and OSI Model have the same number of layers Correct
  • TCP/IP is the protocol used today but OSI Model is often used to describe network communication
Which of the following TCP/IP protocols exist at the transport layer of the TCP/IP reference model? (Choose two.)
  • · UDP · TCP Correct
Which organization develops the 802 family of standard for wired and wireless LANs and MANs?
  • IEEE Correct
Which organization is responsible for developing communications standards for Voice over IP (VoIP) devices?
  • The Telecommunications Industry Association (TIA) Correct
Which organization is responsible for the standard that defines Media Access Control for wired Ethernet?
  • IEEE Correct
Which OSI reference model layer is responsible for common representation of the data transferred between application layer services?
  • Presentation Correct
Which PDU is processed when a host computer is de-encapsulating a message at the transport layer of the TCP/IP model?
  • segment Correct
Which procedure is used to access a Cisco 2960 switch when performing an initial configuration in a secure environment?
  • Use the console port to locally access the switch from a serial or USB interface of the PC. Correct
Which standard specifies the Ethernet MAC sublayer functionality in a computer NIC?
  • IEEE 802.3 Correct
Which statement accurately describes public IP addresses?
  • Public IP addresses must be unique across the entire Internet Correct
Which statement describes a characteristic of the frame header fields of the data link layer?
  • They vary depending on protocols Correct
Which statement describes a feature of an IOS host name configuration?
  • It does not allow spaces Correct
Which statement describes a network that supports QoS?
  • The network provides predictable levels of service to different types of traffic Correct
Which statement is correct about network protocols?
  • They define how messages are exchanged between the sources and the destination Correct
Which statement is true about an interface that is configured with the IPv6 address command?
  • A link-local IPv6 address is automatically Correct
Which TCP header field specifies the number of bytes that can be accepted before an acknowledgement is required?
  • Window size Correct
Which TCP/IP model layer is responsible for providing the best path through the network?
  • Internet Correct
Which technology would be best to provide a home user with a highspeed, always-on Internet connection?
  • DSL Correct
Which term defines the processing capabilities of a switch by rating how much data can be processed per second?
  • forwarding rate Correct
Which three fields are used in a UDP segment header? (Choose three.)
  • · Source Port · Checksum · Length Correct
Which two components are added to the PDU at the network access layer? (Choose two.)
  • · frame header · Trailer Correct
Which two connection options provide an always-on, high-bandwidth Internet connection to computers in a home office? (Choose two.
  • · Cable · DSL Correct
Which two engineering organizations define open standards and protocols that apply to the data link layer?
  • International Telecommunication Union (ITU) Correct
Which two factors influence the method that is used for media access control? (Choose two.)
  • · how connection between nodes appears to the data link layer · how nodes share the media Correct
Which two files are loaded into RAM by the router when it boots? (Choose two.)
  • · startup configuration · IOS image Correct
Which two functions or operations are performed by the MAC sublayer? (Choose two.)
  • · it adds a header and trailer to form an OSI Layer 2 PDU · It is responsible for Media Access Control Correct
Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)
  • · Cellular · satellite Correct
Which two message timing mechanisms are used in data communication? (Choose two.)
  • · response timeout · flow control Correct
Which two statement describe broadcast transmissions on a wired network? (Choose two.)
  • · Directed broadcasts are intended for all hosts on a local or remote network · Limited broadcasts are only intended for the hosts on a local network Correct
Which two statements are true of the deterministic access method?(Choose two.)
  • · The throughput is predictable · Devices take turns transmitting Correct
Which two statements are true regarding the user EXEC mode? (Choose two.)
  • · Only some aspects of the router configuration can be viewed · This is the default mode on an unconfigured router when first powered up. Correct
Which two statements describe intermediary devices? (Choose two.)
  • · Intermediary devices direct the path of the data. · Intermediary devices connect individual hosts to the network. Correct
Which type of IPv6 address is not routable and used for communication on a single subnet?
  • link-local address Correct
Which type of network design combines voice, video, and data on the same communication channel?
  • a converged network Correct
Which type of traffic must receive the highest priority from QoS?
  • VoIP Correct
Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
  • Time-to-Live Correct
Why would a network administrator use the CLI of the Cisco IOS?
  • to add a password to a Cisco network device Correct
Why would a technician enter the command copy startup-config running config?
  • to copy an existing configuration into RAM Correct
Within a production network, what is the purpose of configuring a switch with a default gateway address?
  • The default gateway address is used to forward packets originating from the switch to remote networks Correct
Your organization is issued the IPv6 prefix of 2001:0000:130F::/48 by your service provider. With this prefix, how many bits are available for your organization to create subnetworks?
  • 128 Correct
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