Chapter 1 Flashcards
Intro to Networking
What is the 7th layer and what is the purpose of the OSI model?
Application - Protocols enable software programs to negotiate formatting, procedural, security, synchronization, and other requirements with the network (Not the application themselves)
What is the 6th layer of the OSI model and what is its purpose?
Presentation - Protocols that are responsible for reformatting compressing, and/or encrypting data in a way the application on the receiving end can read
What is the 5th layer and what is the purpose of the OSI model?
Session - Describes how data between applications is synced and recovered if messages don’t arrive in tact at the receiving end
What is the 4th layer and what is the purpose of the OSI model?
Transport - Responsible for transporting application layer payloads from one application to another
What is the 3rd layer and what is the purpose of the layer in the OSI model?
Network- Moves the message from one node to the other until they reach the destination host
What is the 2nd layer and what is the purpose of the OSI model?
Data Link - Bridges the physical layer’s networking media with network layer processes
What is the 1st layer and what is the purpose of the OSI model?
Physical - Responsible for sending bits via a wired or wireless transmission
What is a logical topology?
Lays out how data is transferred between nodes
Lays out how access to the network is controlled
Lays out how specific resources are shared
What is an NOS?
Network Operation System
What is AD DS?
Active Directory Domain Services
What are protocols in networking?
The standard methods and formats for communication between network devices
What is TLS?
Transport Layer Security - An updated version of SSL protocol uses different encryption algorithms and is more secure
What is SSL?
Secure Sockets Layer - Encryption Protocol that encrypts TCP/IP transmissions between client and web server (uses public key encryption)
What is a switch and what is the purpose?
A switch is a networking device that connects devices/nodes to each other and manages data traffic within a network (2nd and 3rd layer)
What is a back bone?
A conduit that connects the pieces of a network
What is a hub-and-spoke topology?
A central device is connected to multiple network peripherals
What is the purpose of a router?
To connect 2 networks
What is a node?
A connection point among network devices such as routers, printers or switches that can receive and send data from one endpoint to the other
What is the SNMP protocol?
Simple Network Management Protocol - Protocol used to the monitor and manage devices on a network (7th layer)
What is a payload?
Is data passed between applications/utilities and the OS
What is an API?
Application Programing Interface - Access point into a software’s available processes through which a specific type of request generates a particular kind of response (Uber using Google Map’s API to map routes)
What is a header and what layer in the OSI model is it added in?
Area at the beginning of a payload where protocols add control information
What is encapsulation?
The process of adding a header to the data inherited from the layer above
What is a port?
A number that identifies a process (TCP/UDP ports ensure data is transmitted to the correct process
