Chapter 7
Which layer has been subdivided into the Logical Link Control sublayer and the Media Access Control sublayer?
Data Link
Which is the IEEE standard that sets the standards for wireless (Wi-Fi) networking?
802.11
Which IEEE 802 standard applies to Ethernet?
802.3
The addition of information to a PDU as it's passed from one layer to the next is called which of the following?
encapsulation
One shortcoming of the OSI Reference Model is that it does not provide a common framework to work with and learn from.
False
The Network layer of communicates with the Data Link layer and the Session Layer
False
The Media Access Control (MAC) sublayer defines the use of logical interface points, called Service Access Points (SAPs).
False, The LLC of the Data Link layer defines the use
Which layer of the OSI model is responsible for encryption and decryption?
Presentation
What does the Transport layer use to make sure that a message is reassembled correctly on the receiving device?
Sequence Number
The size of a frame in bytes
1518
Which OSI layer is responsible for setting up, maintaining, and ending ongoing information exchanges across a network?
5
Which OSI layer creates and processes frames?
Data Link
Which of the following protocols are found at the Application layer of the OSI model? (Choose all that apply.)
FTP SNMP DHCP
What are the names of the sublayers specified as part of Project 802? (Choose all that apply.)
LLC and MAC
The two sublayers of the Data Link layer are the _____ and media access control (MAC).
Logical Link Control
Which sublayer defines the use of logical interface points, called Service Access Points (SAPs)?
Logical Link Control
At which Data Link sublayer does the physical address reside?
MAC
The Transport layer segments data into smaller chunks, the size of which is determined by which of the following?
MTU
_____ 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.
Peer
Which OSI layer handles flow control, data segmentation, and reliability? Physical Session Network Transport Data Link
Transport
The _____ size is a negotiated amount between the transmitting and receiving devices that sets the amount of data that can be transferred before an acknowledgement must be sent and received.
Window
What information would you find in the header of a Transport layer PDU? Source MAC Address Cyclic Redundancy Check Window Size Destination IP Address All of These Choices
Window Size
Put the OSI Model in Order
application presentation session transport network data link physical
Which layer of the OSI model does Project 802 divide into two sublayers? Network and Data Link Physical Data Link Data link and Physical Network
Data Link
The Physical layer has been divided into two sublayers, called the LLC sublayer and the MAC sublayer.
False
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.
False
The ____________ layer of the OSI model is the bottom layer, and its job is to convert bits into signals and vice versa.
Physical
Which of the following elements might the Data Link layer add to its PDU? (Choose all that apply.)
Physical Address TTL Port Number Sequence Number
In a layered approach, each layer is only responsible for a specific task instead of the end-to-end communication.
True
In the IEEE 802 standards, each number after the dot represents a different technology or subset of a technology.
True
One of the problems that can occur in the Network layer is the incorrect configuration of a hosts IP address.
True
Peer communication between layers means that each layer on the receiving computer sees network data in the same format its counterpart on the sending computer did.
True
The "802" in the IEEE 802 standard represents the year and the month that the project began—February of 1980.
True
The IEEE felt the need to develop LAN standards to ensure that network interfaces and cabling from multiple manufacturers would be compatible.
True
The PDU for the Application, Presentation, and Session layers is data.
True
The Transport Layer is the same in both the OSI model and the TCP/IP
True
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? Access Control Media Control Packet Forwarding Signal Bounce
Access Control
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.)
Ethernet works at the 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. Changes in technology at one layer of the OSI model don't usually affect the operation of other layers.
The segmenting of the data is important because every network technology has a maximum frame size called the ____________________________________.
Maximum Transmission Unit
