AND ANSWERS GRADED A+
◉Address that broadcasts to current network. Answer:
255.255.255.255
◉ARP (Address Resolution Protocol). Answer: Required to go from
Layer 2 to 3, broadcasts to a network querying for an IP Address,
once found, sends it back to requesting MAC
◉DNS (Domain Name System). Answer: Name to an IP Address
(TCP/UDP 53)
◉Layer 3 Network Protocols. Answer: ICMP (Ping and Traceroute)
◉Layer 4 Transport Protocols. Answer: TCP (Connection) and UDP
(Connectionless)
◉3-Way Handshake (TCP). Answer: A: SYN
,B: SYN ACK
A: ACK
◉Closing a TCP Session. Answer: A: FIN
B: ACK
B: FIN
A: ACK
◉Sniffer. Answer: Program and/or device that monitors data
traveling over a network
◉Bluetooth current Encryption. Answer: AES, vulnerabilities in the
Application layer
◉802.11b supports up to. Answer: 11 Mbps at 2.4 GHz
◉802.11a supports up to. Answer: 54 Mbps at 5 GHz
◉802.11g supports up to. Answer: 22/54 Mbps at 2.4 GHz
◉802.11n supports up to. Answer: 54-600 Mbps at 5 GHz
, ◉802.11ac supports up to. Answer: 1300 Mbps at 5 GHz
◉802.11i. Answer: Authentication at Layer 2, provides strong
encryption, replay protection and integrity protection - WPA2
◉Wireless Encryption Standards. Answer: WEP -> WPA -> WPA2
◉Defense-in-Depth. Answer: Multiple levels of protection deployed
in an environment in order to further protect all layers of the OSI
Model and critical assets
◉Risk=. Answer: Threats * Vulnerabilties
◉Threat. Answer: Potential to do harm to a System
◉Vulnerability. Answer: Ability for the threat to cause harm to a
system
◉CIA (Confidentiality). Answer: Information is available only to
those who need access to it
◉CIA (Integrity). Answer: No unauthorized changes to the file