CCNA CyberOps (SECFND) Practice Questions

Chapter 1: Network Concept
1. What OSI layer is responsible for creating an impermanent communication session between two applications and guaranteeing that transmitted data can collect in appropriate order? A. Session B. Transport C. Network D. Data link 2. Which statement is correct about the TCP/IP and OSI models? A. The TCP/IP transport layer and OSI Layer 4 provide similar services and functions. B. The TCP/IP network access layer has similar functions to the OSI network layer. C. The OSI Layer 7 and the TCP/IP application layer provide identical functions. D. The first three OSI layers describe general services that are also provided by the TCP/IP Internet layer. 3. How do UDP scans work? A. By establishing a three-way handshake. B. By sending SYN packets to see what ports are open. C. UDP scans have to rely on ICMP “port unreachable” messages to determine whether a port is open. When the scanner sends a UDP packet, and the port is not open on the victim’s system, that system responds with an ICMP “port unreachable” message. D. By sending ICMP “port unreachable” messages to the victim.