Comptia Network+ Chapter 1 Flashcards
What is the OSI model?
Open System Interconnection: A model used to conceptualize the many parts of a network.
What is the TCP/IP model?
Open System Interconnection: A model used to conceptualize the many parts of a network.
Who created the ISO model?
The International Organization for Standardization.
What are the 7 layers of the OSI reference model?
7. Application6. Presentation5. Session4. Transport3. Network2. Data Link1. Physical
What is the first layer of the OSI model?
The Physical Layer: This layer is comprised of the Physical Components used to transport data from one place to another. This can be anything from copper cabling to Radio Waves from a WAP.
What is UTP?
Unshielded twisted pair, the most common type of networking cable, includes most phone and Ethernet lines
What is a NIC?
Network Interface Card - a communication controller that is required by a computer to connect to a network.⢠Translates the computer data to the protocol used by the network.
What is a MAC address?
48 bit address used to identify networking cards and appliances
What is the IEEE?
Institute of Electrical and Electronics Engineers
What is OUI?
The organizational Unique Identifier, the first 24 bits of a MAC address that define what company made it
What is ipconfig?
Ipconfig is a utility program that is commonly used to identify the addresses information of a computer on a network. It can show the physical address as well as the IP address.
what is ipconfig/ all?
A more detailed version of ipconfig.
What is ifconfig?
The ipconfig command but for users of a Unix based OS.
What is EUI-48?
Extended Unique Identifier: the name for the address space that MAC addresses occupy.
What is MAC-48?
The original name for the numbering space MAC addresses occupy.
What is a Frame?
A container for a chunk of data moving across a network. This is a "wrapper" placed on data by a NIC. These are sent, received, and read by NICs.
What is a PDU?
Protocol Data Unit: The unit of data specified by a protocol at each layer of the OSI Model.
What is FCS?
A Frame Check Sequence(FCS) is error detection method used by PPP encapsulation. If the FCS key does not match the receiving NIC's answer, the data was not received properly, and the frame is dropped.
What is PPP?
Point-to-Point Protocol
What is CRC?
A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.
What is a HUB?
A precursor to modern switches, this network device would receive data from a host and then would forward this data to every host on the network.
Describe layer 2 of the OSI Model
Data Link Layer: This layer deals with the forwarding of information based on MAC addresses. Switches and NICs operate at this level. PDU= Frames. Routers function at this layer