CHAPTER 7
peer communication between layers means that each layer on the receiving computer sees network data in the same format its couterpart on the sending computer did? True or False
True
the "802" in the IEEE 802 standard represents the year and the month that the project began - February of 1980.? True or false
True
the network layer forms frames from the data link layer into packets? True or false
True
which sublayer defines the use of logical interface points, called service access points (SAPs)?
logical link control
put the following layers of the OSI model in the proper numeric order:
1. physical 2. data link 3. network 4. transport 5. session 6. presentation 7. application
The Network layer communicates with the Data Link and the session layer? True or False
False
The media access control (MAC) sublayer defines the use of logical interface points, called service access points (SAPs). True or False
False
_______communication refers to the way that each layer on a transmitting computer communicates with the same layer on the receiving computer, just as though they were in direct contact
Logical
The _______________________ sublayer of the data link layer defines logical interface points, called service access points (SAPs) that transfer information from this sublayer to upper OSI layers. it also includes error detection and recovery
Logical Link Control (LLC)
The two sublayers of the data link layer are the ______and media access control (MAC)
Logical link control (LLC)
The segmenting of the data is important because every network technology has a maximum frame size called the ___________________
Maximum Transmission Unit
which of the following operate at the presentation layer? a. MIDI b. FTP c. SMTP d. TFTP e. JPEG
a MIDI and e JPEG are answers
which of the following is a protocol found at the network layer? (choose all that apply) a. ARP b. IP c. SNMP d. ICMP e. ethernet
a. ARP, b. IP, d, ICMP
which layer or the OSI model does project 802 divide into two sublayers? a. Data link b. Data link and physical c. Network d. Network and Data Link e. Physical
a. Data Link
which of the following are transport layer protocols? a. TCP and UDP b. IP c. FTAM d. IP and TFTP e. TFTP
a. TCP and UDP are answers
the layers of the osI model, from the top down, are: a. application, presentation, session, transport, network, data link, physical b. session, presentation, data transport, MAC, network, physical c. physical, data link, network, transport, session, presentation, application d. presentation, application, session, network, data link, physical e. application, encryption, network, transport, logical link control, physical
a. application, presentation, session, transport, network, data link, physical
What are the sublayers of the data link layer? a. MAC and IPX b. hardware and frame c. MAC and LLC d. WAN and LAN e. TFTP and telnet
c. MAC and LLC
Packets are found at which layer? a. data link b. transport c. network d. session e. physical
c. network
The ____size is a negotiated amount between the transmitting and receiving devices that sets the amount of data that can be transferred before an acknowledgment must be sent and received.
window
one shortcoming of the OSI reference model is that it does not provide a common framework to work with and learn from? True or False
False
in a layered approach, each layer is only responsible for a specific task instead of the end-to end communication? True or False
True
one of the problems that can occur in the network layer is the incorrect configuration of a hosts IP address? True or False
True
The network layer communicates with the data link layer and the session layer? True or false
false
most logical addresses are preset in network interface cards at the factory? True or false
false
The PDU at the transport layer is data? True or False
false /segment
the protocol data unit (PDU) at the data link layer is called a(n)______________
frame
when the data link layer receives a frame, it first calculates the CRC and compares it to the incoming frame's CRC to make sure that the values are the same? True or false
False
The maximum transmission unit for Ethernet is 1500 bytes plus an additional 18 bytes of header/trailer? True or false
True
The network layer uses logical addresses to route data? True or false
True
The open systems interconnect (OSI) model was developed by the international organization of standardization (ISO) True or False
True
The pdu for the application, presentation, and session layers is data? True or false
True
Transport layer is the same in both the osi model and the TCP/IP model? True or False
True
which of the following protocols are found at the application layer of the OSI model? (choose all that apply) a. TCP b. ARP c. ICMP D. SNMP e. DHCP f. FTP
D, SNMP, e, DHCP, f, FTP
which osi layer creates and processes frames?
Data link
The network layer uses physical addresses to route data to destination hosts? True or false
False
The physical layer has been divided into two sublayers, called the LLC sublayer and the MAC sublayer? True or False
False
The _____________layer of the OSI model is the bottom layer, and its job is to convert bits into signals and vice versa
Physical
Match the layers of the OSI model with their counterparts in the TCP/IP model
Presentation - Application Session - Application Application - Application Transport - Transport Network - Internetwork Data link - Network Access Physical - Network Access
In the IEEE 802 standards, each number after the dot represents a different technology or subset of a technology? True or False
True
Logical addresses are configured by a network administrator? True or false
True
The IEEE felt the need to develop LAN standards to ensure that network interfaces and cabling from multiple manufacturers would be compatible? True or False
True
The PDU for the application, presentation, and session layers is data? True or false
True
bits are packaged into frames at which layer of the OSI model? a. data link b. transport c. physical d. presentation e. application
a. data link
what is the protocol Data Unit (PDU) employed at the Data Link Layer? a. frames b. bits c. packets d. segments e. none of the above
a. frames
what are the names of the sublayers specified as part of project 802? (choose all that apply) a. logical link control (LLC) b. Data Link control (DLC) c. physical d. carrier sense multiple access/collision detection (CSMA?CD) e. media access control (MAC)
a. logical link control (LLC), e. Media link control (LLC)
which layer translates between physical (MAC) and logical addresses? a. network b. data link c. transport d. physical e. session
a. network
how can you find out what your MAC address is (choose all that apply) a. open a command prompt and type the command ipconfig/all. b. Issue the netstat -r command c. right-click on the local area connection and choose status d. open a command prompt and type the command arp -d e. open a command prompt and type the command getmac
a. open a command prompt and type the command ipconfig /all, b. issue the netstat -r command, e. open a command prompt and type the command getmac.
The part of OSI where one most commonly finds data encryption, compression, and other encoding for network communication is a. presentation (layer six) b. application (layer seven) c. session (layer five) d. data link (layer two) e. none of these choices
a. presentation (layer six)
Error detection and recovery takes place at which layer? a. transport b. presentation c. data link d. application e. network
a. transport
what layer of the osi model is designed to perform error recovery functions? a. transport b. data link c. physical d. network e. none of these choices
a. transport
what information would you find in the header of a transport layer pdu? a. window size b. destination IP address c. Source MAC address d. All of these choices e. Cyclic reduncancy check
a. window size
which of the following are benefits of using a layered network model? a. it specifies how changes to one layer must be propagated through the other layers b. it facilitates troubleshooting c. it focuses on details rather than general functions of networking d. it breaks the complex process of networking into more manageable chunks e. it allows layers developed by different vendors to interoperate
b, d, and E are answers
which osi layer is responsible for setting up, maintaining, and ending ongoing information exchanges across a network? a. 3 b. 5 c. 1 d. 2 e. 4
b. 5
which of the following elements might the data link layer add to its pdu? (choose all that apply) a. sequence number b. CRC c. physical addresses d. port numbers e. time-to-live
b. CRC, c. physical addresses
One job that a router performs is that of gatekeeper, which means that it can be configured to only allow certain packets access into the network based on a list of rules. What is that process called? a. signal bounce b. access control c. packet forwarding d. media control
b. access control
At what layer do NICs operate? a. transport b. data link c. all of these choices d. network e. physical
b. data link
Bridges operate at which layer of the OSI model? a. physical b. data link c. transport d. network e. session
b. data link
which layer has been subdivided into the logical link control sublayer and the media access control sublayer? a. network b. data link c. internetwork d. physical e. transport
b. data link
what does OSI stand for? a. international standards organization b. open systems interconnect c. operating standard information d. operating system interconnection e. open systems interface
b. open systems interconnect
Encryption takes place at which layer? a. application b. presentation c. session d. transport e. data link
b. presentation
Which layer handles the formatting of application data so that it will be readable by the destination system? a. application b. presentation c. session d. transport e. data link
b. presentation
what does transport layer use to make sure that a message is reassembled correctly on the receiving device? a. window size b. sequence number c. destination port number d. source port number e. acknowledgement
b. sequence number
Flow control takes place at which layer? a. physical b. transport c. network d. MAC sublayer of the data link layer e. session
b. transport
which layer is responsible for packet sequencing, acknowledgments, and requests for retransmission? a. the MAC sublayer of the data link layer b. transport c. physical d. application e. network
b. transport
The original commercial version of ethernet supported 10 mbps bandwidth; the version introduced in the early 1990s supports 100 mbps; and in 1998, Gigabit ethernet was introduced. all versions use the same data frame formats, with the same maximum pdu sizes, so they can interoperate freely. given this information and what you know of layered technologies, which of the following statements is true? (choose all that apply)
c. Ethernet works at eht data link and physical layers of the osi model and upgrades to newer faster versions of ethernet can be made by changing only the components that work at these layers. d. changes in technology at one layer of the model don't usually affect the operation of others layers.
The transport layer segments data into smaller chunks, the size of which is determined by which of the following? a. LLC b. PDU c. None of these choices d. MSS e. TCP
c. None of these choices
which IEEE 802 standard applies to ethernet? a. 802.2 b. 802.5 c. none of these choices d. 802.11 e. 802.4
c. None of these choices
which of the following are considered to be the upper layer protocols? a. presentation and session b. application and presentation c. application, presentation, and session d. application, presentation, session, and transport e. application
c. application, presentation, and session
The addition of information to a PDU as it's passed from on e layer to the next is called which of the following? a. segmentation b. deencapsulation c. encapsulation d. all of these choices e. fragmentation
c. encapsulation
Routers operate at what layer of the OSI Model? a. physical b. transport c. network d. MAC sublayer of the data link layer e. session
c. network
Which layer establishes, maintains, and terminates communications between applications located on different devices? a. application b. presentation c. session d. network e. data link
c. session
Which is the IEEE standard that sets the standards for wireless networking? a. 802.22 b. 802.15 c. 802.3 d. None of these choices e. 802.16
d. None of these choices
the upper layers of the OSI model are (in numeric order): a. session, presentation, application b. session, application, presentation c. session, application, presentation, physical d. application, presentation, session, physical e. None of these choices
d. application, presentation, session, physical
IP is implemented at which OSI model layer? a. transport b. session c. data link d. network e. logical link control
d. network
Repeaters and hubs operate at which layer? a. network b. data link c. transport d. physical e. session
d. physical
which device works on the data link layer? a. Bridge b. gateway c. router d. repeater e. hub f. multiport reapeater
d. repeater
what is the name of the protocol data unit (PDU) at the Transport layer? a. All of these choices b. Fragment c. packet d. segment e. frame
d. segment
which OSI layer handles flow control, data segmentation, and reliability? a. session b. data link c. physical d. transport e. network
d. transport
At which data link sublayer does the physical address reside? a. Network Access control (NAC) b. Logical Link control (LLC) c. physical d. Data Access control (DAC) e. None of these choices
e. None of these choices
but synchronization is handled at which layer? a. data link b. session c. transport d. presentation e. physical
e. physical
Which layer of the OSI model is responsible for encryption and decryption? a. all of these choices b. session c. presentation d. application e. transport
e. transport
which of the following are presentation layer standards? a. MIDI b. TIFF c. JPEG d. MPEG e. GIF f. All of the above
f. all of the above