Network and Security - Foundations - C172 - Most Import Materials for Final Objective Assessment Test Questions with 100% Complete Solutions, A+

802.11a/Wireless-A - wireless 5GHz - 54Mbps - *75ft* 802.11b/Wireless-B - wireless 2.4GHz - *11Mbps* - 100-150ft 802.11g/Wireless-G - 2.4GHz - *54Mbps - 150ft* 802.11ac/Wireless-AC - 5GHz - *1.3Gbps* 802.11n/Wireless-N - 2.4GHz - *200+Mbps* 2.4GHz - Frequency ranges of 802.11G/802.11B 5GHz - Frequency ranges of 802.11AC/802.11A Application Layer - Layer 7 in the OSI model. Support for applications. Examples: HTTP, FTP, SMTP Presentation Layer - Layer 6 in the OSI model. Protocol conversion, data translation. Examples: ASCII, JPEG Session Layer - Layer 5 in the OSI model. Establishes, manages, and terminates sessions. Examples: NFS, SQL Transport Layer - Layer 4 in the OSI model. Ensures error-free packets. Examples: TCP, UDP Network Layer - Layer 3 in the OSI model. Provides routing decisions. Examples: IP, IPX Data Link Layer - Layer 2 in the OSI model. Provides for the flow of data. Examples: MAC addresses. Physical Layer - Layer 1 in the OSI model. Signals and media. Examples: NICs, twisted-pair cable, fiber. OSI model - Application, Presentation, Session, Transport, Network, Data Link, Physical. (*P*lease *D*o not *T*hrough *S*asuage *P*izza *A*way) Application Layer (TCP/IP) - Defines the applications used to process requests and which ports and sockets are used Transport Layer (TCP/IP) - Defines the type of connection established between hosts and how acknowledgements are sent Internet Layer (TCP/IP) - Defines the protocols used for addressing and routing the data packets