CompTIA Network+ N10-008 CH1 - Course Quiz
Routers operate at the Network layer (Layer 3) of the OSI model. They route packets based on IP addresses and determine the optimal path for data between different networks.
Routers function at which Layer of the OSI Model?
Transport
Network
Physical
Data Link
Network
Key Terms
Routers function at which Layer of the OSI Model?
Transport
Network
Physical
Data Link
Network
Which Layer of the OSI Model refers to the Code built into Operating Systems that Enables Network-Aware Applications?
Session
Application
Transport
Presentation
Application
How many Layers does the OSI Model Contain?
3
9
5
7
7
Which statement desribes an IP Address?
It is a Unique Identifier burned into the NIC when it is manufactured.
It is a Number shared by All Computers on the same Network.
It is a Unique Dotted Decimal Number assigned to every Network Device.
It is a Number assigned only to Routers, identifying their Priority Ratings.
It is a Unique Dotted Decimal Number assigned to every Network Device.
A MAC Address is also known as ______ address?
IP
Router
Physical
Logical
Physical
Which Layer of the OSI Model defines a Method of Transmission using Radio Waves?
Physical
Application
Presentation
Session
Physical
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| Term | Definition |
|---|---|
Routers function at which Layer of the OSI Model? Transport | Network |
Which Layer of the OSI Model refers to the Code built into Operating Systems that Enables Network-Aware Applications? Session | Application |
How many Layers does the OSI Model Contain? 3 | 7 |
Which statement desribes an IP Address? It is a Unique Identifier burned into the NIC when it is manufactured. | It is a Unique Dotted Decimal Number assigned to every Network Device. |
A MAC Address is also known as ______ address? IP | Physical |
Which Layer of the OSI Model defines a Method of Transmission using Radio Waves? Physical | Physical |
Routers use Logical Addresses to forward data? True | True |
Which Layer of the OSI Model uses Routers and IP Addresses to ensure that Packets arrive at the Correct System? Data Link | Network |
Which two parts are included in a MAC Address? The IP Address and the NIC’s Serial Number | The Organizationally Unique Identifier (OUI) and the Device ID of the NIC |
Which OSI Model Layer initiates requests for Packets that were not received in good order? Application | Transport |
Which Layer of the OSI Model adds Sender and Receipient MAC Addresses to Frames? Network | Data Link |
How are incoming frames handled by a Switch? The Switch broadcasts the contents of the frames to every device on the Network. | The Frames are sent only to the interface associated with the Destination MAC Address |
Where does the CRC originate in a Network Frame? The receiving NIC attaches it. | The sending NIC attaches it. |
Logic Link Control (LLC) and Media Access Control (MAC) are two parts of which OSI Model Layer? Transport | Link |
Describe what happens at each Router as Data is sent from one Computer to another on a TCP/IP Network such as the Internet? | The Data can go through many Routers before it reaches its Destination. |
Name a mnemonic presented in the Text as a way to memorize the Layers of the OSI Model? | All --------------- Application People -------- Presentation Seem ---------- Session To --------------- Transport Need ----------- Network Data ------------ Data Link (MAC/LLC) Protection ---- Physical |
Describe how the Encapsulation process is used in the Transport, Network, and Data Link Layers? | The Transport Layer creates a Segment or Datagram and hands it down to the Network Layer. |
Briefly describe how the Internet Protocol makes sure that a piece of data gets to its intended destination on the Network? | TCP/IP is the Primary Logical Addressing Protocol |
How does the destination system know how to put packets in the correct order? | The Sending System embeds a sequencing number into the Data of each Packet containing a segment. |
The OSI Model’s Session Layer initiates sessions, accepts incoming sessions, and _________ existing sessions? | opens and closes |
All FCSs are ________ bytes long? | 4 |
When a Serving Computer receives a request for some data, it must be able to chop the requested data into chunks that will fit into a packet, organize the packets for the benefit of the receiving system, and hand them to the NIC for sending. This is called __________? | segmentation |
A ___________ is a tool that enables a technician to see electrical pulses? | oscilloscope |
If you want to see how many sessions are running on a TCP/IP Network, you should use the ________ program from the command prompt? | netstat netstat -a |
Which Layer of the OSI Model uses Connection-Oriented Protocols? Link | Transport (Layer 4) |
What Device connects Subnets? Bridge | Router |
For a Network Technician, one benefit of understanding the OSI Seven-Layer Model is using it as a primary tool for _? connecting PCs to the Internet | troubleshooting Networks |
How long is a MAC Address? 6 binary digits | 48 bits Explanation: |
The FCS uses a type of binary math called a Cyclic Redundancy Check (CRC) that the receiving NIC uses to verify that the data arrived intact? True | True |
What unique identifier is assigned to each device on the Network by the IP protocol in the OSI Model's Network Layer? Router name | IP Address |
Frames in MOST wired Networks hold at most ? 150 bytes of data | 1500 bytes of data |
Which is a Broadcast MAC Address? 255.255.255.255 | FF-FF-FF-FF-FF-FF |
Which Layer of the OSI Model is associated with moving Data between Computers? Layer 2 | Layer 1 - Physical |
One function of a NIC is to ? use the CRC to verify the Data within each Frame arrived intact | use the CRC to verify the Data within each Frame arrived intact |
When a NIC sends a Frame that contains the Broadcast Address, every NIC on the Network processes that Frame? True | True |
Name the 5 parts that make up the basic generic Ethernet Frame? | 1 - Recipient's/Destination MAC Address 2 - Sender's/Source MAC Address 3 - Data Type Field 4 - DATA 5 - FCS (Frame Check Sequence) |
Explain how a CRC is used to figure out whether the Data recevied is accurate or not? | CRC is a 32 bit Redundancy check that basically says if the Frame Size is smaller/degraded from when the Frame started, then it requests the Full Frame to be sent again to ensure its properly sent in its entirety. |
Describe the functions of the OSI Model's Logical Link Control (LLC) Sublayer? | The LLC is the aspect of the NIC that talks to the System's OS usually via Device Drivers. |
A MAC Address is usually writen in notation? | hexadecimal/hex |
A Container created at the OSI Data Linke Layer for carrying discrete chunks of data across a Network is called a ? | Frame |
The Connectionless Protocol is called the ? | UDP (User Datagram Protocol) |
Different types of Networks use different sizes of ? | Frames |
Named after two Protocols, __ is really a Protocol suite designed to work together? | TCP/IP (Transmission Control Protocol/Internet Protocol) |
Applications may include additional functions, such as Encryption, User Authentication, and Tools to control the look of the data? True | True |
Which statement describes a capability of Routers? Routers allow Network connections across data lines that do not use Ethernet. | Routers allow Network Connections across data lines that do not use Ethernet. |
Which statement best describes an Application Programming Interface? It is a protocol that allows Web browsers to request data from a Web Server. | It provides programmers with a standard way to extend an application's capabilities. |
The Transport Layer creates a Segment or Datagram and hands it down to the Network Layer? True | True |
The Application Layer doesn't refer to the Applications themselves; it refers to the Code built into all Operating Systems that enables Network-Aware Applications? True | True |
All NICs on the same network must use the same , or they will not be able to communicate with other NICs? Frame Check Sequence | Frame Type |
Explian what happens to a Packet when it reaches the Destination Subnet Router? | Once the Packet reaches the Destination Subnet's Router, the Router will strip off the Incoming Frame, look at the Destination IP Address, then add a Frame with the appropriate Destination MAC Address that matches the Destination IP Address and ship it off. |
What Network Device (found on every network connected computer) creates Outgoing Frames, Reads Incoming Frames, and attches MAC Addresses? | Network Interface Card (NIC) |
What is the Role of the NIC's Driver Software? | The NIC's Driver Software is the interconnection between the Hardware and the Software. |
In the context of Networking, what are Protocols? | Established set of rules that determine how data is transmitted between devices on a Network. |
Briefly describe the Two distinct jobs a NIC performs to keeping Data moving? | First: Logical Link Control (LLC) - is the aspect of the NIC that talks to the OS and handles multiple Network Protocols and provides Flow Control. Second: Media Access Control (MAC) - creates and addresses the Frame. |
Layer 6 of the OSI Model is called the _ Layer? | Presentation |
The OSI Model's Presentation Layer translates data from lower layers into a format usable by the _ Layer, and visa versa? | Application |
If you have a Windows System, type _ from the command prompt to display the MAC Address for your Computer? | ipconfig /all |
All Operating Systems have __ that programmers can use to make their programs Network aware? | Application Programming Interfaces (APIs) |