Network and Security - Foundations - C172 - Most Import Materials for Final Objective Assessment Test Already Rated A

Network and Security - Foundations - C172 - Most Import Materials for Final Objective Assessment Test Already Rated A 802.11a/Wireless-A 802.11b/Wireless-B 802.11g/Wireless-G 802.11ac/Wireless-AC 802.11n/Wireless-N 2.4GHz wireless 5GHz - 54Mbps - *75ft* wireless 2.4GHz - *11Mbps* - 100-150ft 2.4GHz - *54Mbps - 150ft* 5GHz - *1.3Gbps* 2.4GHz - *200+Mbps* Frequency ranges of 802.11G/802.11B 5GHz Frequency ranges of 802.11AC/802.11A Application Layer Presentation Layer ASCII, JPEG Session Layer Layer 7 in the OSI model. Support for applications. Examples: HTTP, FTP, SMTP Layer 6 in the OSI model. Protocol conversion, data translation. Examples: Layer 5 in the OSI model. Establishes, manages, and terminates sessions. Examples: NFS, SQL Transport Layer Network Layer Data Link Layer Layer 4 in the OSI model. Ensures error-free packets. Examples: TCP, UDP Layer 3 in the OSI model. Provides routing decisions. Examples: IP, IPX Layer 2 in the OSI model. Provides for the flow of data. Examples: MAC addresses. Layer 1 in the OSI model. Signals and media. Examples: NICs, twisted-pair cable, Physical Layer f iber. 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) sockets are used Transport Layer (TCP/IP) Defines the applications used to process requests and which ports and 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 Network interface Layer (TCP/IP) The well-known ports Defines how the host connects to the network TCP/IP Ports 1-1023 Registered ports Private ports Social Engineering TCP/IP Ports 1024-49,151 TCP/IP Ports 49,152-65,535 A process by which an intruder obtains enough information from people to gain access to the network Password Cracking Dictionary Attack An attack in which the attacker tries to guess the user's password An attack that uses known passwords and many variations (upper- and lowercase and combinations) to try to log in to an account Brute-Force Attack to guess the password An attack in which the attacker uses every possible combination of characters