CompTIA Network+ N10-009 Exam Study Guide - High-Score Study Material

CompTIA Network+ N10-009 Exam Study Guide - High-Score Study Material Transmission Control Protocol (TCP) - answer - Reliable way to send segments across networks. Two way information. A fundamental protocol within the Internet protocol suite that consists of is set of rules that govern the exchange of data The way hand shake - answer - SYN, SYN-ACK, ACK. User Diagram Protocol (UDP) - answer - Connectionless protocol. Unreliable. TCP Data - answer - Segments UDP data - answer - Datagram Layer 4 Data Type - answer - segments UDP is useful for - answer - Audio and video Windowing - answer - Allows the clients to adjust data in each segment Buffering - answer - Occurs when devices allocate memory to store segments if bandwidth is not readily available. Layer 4 devices - answer - TCP and UDP WAN accelerators Load balancers Firewalls (blocking ports and firewalls) Session layer - answer - Keeps conversation separate to prevent intermingling data Set up session - answer - Checking user credentials and assigning numbers to sessions to help identify them. Maintain session - answer - Data transfers back and forth across the network Tear down session - answer - Ending of a session after the transfer is done or when the other party disconnects. Layer 5 devices - answer - H.323 NetBIOS H.323 - answer - Used to set up, maintain, and tear down voice and video connections. RTP (Real-time Transport Protocol) - answer - Streaming Audio or video. Two way format like phone call or FaceTime. NetBIOS - answer - Used to share files over a network. Presentation Layer - answer - Formats the data to be exchanged and secures that data with proper encryption. Data formatting or encryption - answer - Layer 6 (presentation) Data formatting - answer - Dara is formatted by the computer to have compatibility between different devices. American Standard Code for Information Interchange (ASCII) - answer - Text-based language to use. GIF, JPEG, and PNG - answer - A type of Data format Encryption - answer - Used to scramble the data in transit to keep it secure from prying eyes and provide data confidentiality. TLS (Transport Layer Security) - answer - A security protocol that uses certificates and public key cryptography for mutual authentication and data encryption over a TCP/IP connection. Layer 6 things - answer - Scripting languages Standard text Pictures Movie files Encryption algorithms Application Layer (Layer 7) - answer - Provides application level services where users communicate with the computer (file transfer, network transfer) Application services - answer - Unites communicating components from more than one network application. Service advertisement - answer - Sending out of announcements to other devices on the network to state the service they offer. Email application Web browsing Domain name service File transfer protocol Remote access - answer - Layer 7 Physical Layer (Layer 1) - answer - Where transmission of bits across the network occurs and includes physical and electrical network characteristics. Physical layer data - answer - bits Transmission Modulation - answer - If it changes during the clock cycle, then a 1 is represented (otherwise, a 0 is represented) True or false: cables are also part of the physical layer - answer - True Cross over cable flips transmission - answer - True Straight through cable flips transmission - answer - False Asynchronous - answer - Uses start and stop bits to indicate when transmissions occur from the sender to the receiver. Synchronous - answer - Uses a reference clock to coordinate the transmission by both sender and receiver. Broadband - answer - Devices bandwidth into separate channels Baseband - answer - Uses all available frequencies on a medium(cable) to transmit data. Time Division Multiplexing (TDM) - answer - each session takes a turns using time slots, to share the medium between all users. Statistical Time Division Multiplexing (STDM) - answer