Term
| What are the seven layers of the OSI model? (pg. 4) |
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Definition
- Physical
- Data Link
- Network
- Transport
- Session
- Presentation
- Application
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Term
Anything that moves data from one system to another, such as cabling, fiber optics or radio waves is part of which OSI layer? (pg. 7)
A. Network
B. Data Link
C. Physical
D. Transport |
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Definition
C. The Physical layer (Layer 1) is responsible for the transmission and receipt of the signals that represent bits of data from one node to another node.
The Data Link layer is responsible for transferring data between nodes on the same logical segment.
The Network layer is responsible for logical network addressing and forwarding.
The Transport layer is responsible for ensuring reliable data delivery.
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Term
The 48-bit value inside every NIC that is burned onto some type of ROM chip and contains special firmware. (pg. 9)
A. serial number
B. MAC address
C. IP address
D. NIC ID |
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Definition
B. The Media Access Control (MAC) address is a unique identifier that is never repeated so that data is delivered to the right system.
The exam may also call them MAC-48 or EUI-48 (Extended Unique Identifier)
A service tag is also unique identifier assigned to a specific hardware product, like a computer or a printer, but it may not be a 48-bit value like a MAC address.
An IP address isn't "burned" onto hardware; it can be manually assigned and removed, or automatically updated periodically. |
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Term
| The first six digits of a MAC address that represent the number of the NIC manufacturer (pg. 10) |
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Definition
| Organizationally Unique Identifier (OUI) |
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Term
| The last six digits that comprise the manufacturer's unique serial number for a NIC (pg. 10) |
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Definition
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Term
| A container for a chunk of data moving across a network (pg. 13) |
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Definition
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Term
| A ___ encapsulates information and data for easier transmission (pg. 13) |
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Definition
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Term
| The unit of data specified by a protocol at each layer of the OSI model (pg. 13) |
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Definition
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Term
| What are the five different parts of a frame? (pg. 14) |
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Definition
| The recipient's MAC address, the sender's MAC address, the Type field, the Data field, and frame check sequence (FCS) |
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Term
| What is the purpose of the Type field in a typical frame unit? (pg. 14) |
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Definition
| It indicates what is encapsulated in the frame. |
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Term
| What is a frame check sequence? (pg. 14) |
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Definition
| A special bit of checking information that uses a cyclical redundancy check (CRC) to verify that the data arrived intact. |
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Term
| How does a NIC find the MAC address of a destination NIC on the same network if it doesn't already know it? (pg. 16) |
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Definition
| A NIC may send the Layer 2 broadcast address (FF-FF-FF-FF-FF-FF) with a request that every single NIC on the network will process, and the the intended NIC will respond with its MAC address |
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Term
A ___ frame is addressed and sent directly to another device's MAC address, while a ___ frame is sent to to every system on a network. (pg. 18)
A. singlecast
B. broadcast
C. anycast
D. unicast |
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Definition
B. and D. Unicast and broadcast
An anycast frame is sent to a single host from a group sharing the same address.
Singlecast doesn't exst. |
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Term
| Any device that deals with a MAC address is part of Layer ___ of the OSI model (pg. 18) |
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Definition
| Layer 2, the Data Link layer |
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Term
| The aspect of the NIC that talks to the system's operating system, handles multiple network protocols and provides flow control (pg. 20) |
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Definition
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Term
| The aspect of the NIC that creates and addresses the frame (pg. 20) |
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Definition
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Term
| Containers that are created and addressed at the Network layer so they can go from one network to another (pg. 22) |
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Definition
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Term
| The protocol that gives each device on a network an IP address to ensure data goes where it needs (pg. 22) |
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Definition
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Term
| The device that connects each subnet and allows networks to connect across data lines that don't use Ethernet (pg. 23) |
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Definition
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Term
| The server's process of chopping data into chunks that will fit into a packet, organize the packets for the client, and hand them to the NIC for sending (pg. 27) |
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Definition
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Term
| The ___ protocol breaks up data into segments and gives each one some type of sequence number (pg. 27) |
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Definition
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Term
What differentiates UDP from TCP?
(pg. 29-30) |
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Definition
| TCP is a connection-oriented protocol that has fields to ensure data gets to its destination in good order. A UDP datagram lacks most of these extra fields because it doesn't care if the receiving computer gets the data. |
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Term
Software that handles the process of differentiating among various types of connections on a PC (pg. 30) |
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Definition
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Term
| The port numbers dedicated to Web servers are ___ and ___ (pg. 30 or 32) |
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Definition
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Term
| Many operation systems represent a session using the combination of the ___ and ___ for both sides of a TCP or UDP communication. (pg. 32) |
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Definition
| IP address and port numbers |
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Term
The ___ layer translates data from lower layers into a format usable by the Application layer, and vice versa.
(pg. 33) |
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Definition
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Term
| The OSI layer that refers to the code built into an OS that enables network-aware applications. (pg. 34) |
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Definition
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Term
| An ___ is a shared function, subroutine or library that allows programs to communicate with the OS and other programs, providing a standard way for programmers to enhance or extend an application's capabilities (pg. 34) |
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Definition
| Application Programming Interface |
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Term
| Where does a hub send data? (pg. 15) |
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Definition
| To all the systems connected to the hub |
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Term
| The ___ layer of the OSI model controls segmentation and reassembly of data (pg. 27) |
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Definition
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Term
| The ___ layer of the OSI model keeps track of a system's connections to send the right response to the right computer (pg. 30) |
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Definition
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