CCNA Practice Exam Q&A 2023

True statements about the operation of a full-duplex Ethernet network - Answer- There are no collisions in full-duplex mode. A dedicated switch port is required for each full-duplex node. The host network card and the switch port must be capable of operating in full-duplex mode. Which OSI layer header contains the address of a destination host that is on another network? - Answer- Network Layer Which layer of the TCP/IP stack combines the OSI model physical and data link layers? - Answer- Network access layer Which protocol uses a connection-oriented service to deliver files between end systems? - Answer- FTP What do switches do? - Answer- Prevent Ethernet Collisions, Create less collision domains. Mac Address - Answer- Physical Address, Layer 2 devices, Which network device functions only at Layer 1 of the OSI model? - Answer- Hub Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required? - Answer- UDP Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments? - Answer- Transport Layer True statements regarding ICMP packets - Answer- TRACERT uses ICMP packets. They are encapsulated within IP datagrams Statements that accurately describe CDP - Answer- CDP is a Cisco proprietary protocol. CDP is a datalink layer protocol. CDP can discover directly connected neighboring Cisco devices. How does a switch differ from a hub? - Answer- A switch tracks MAC addresses of directly-connected devices. What must occur before a workstation can exchange HTTP packets with a web server? - Answer- A TCP connection must be established between the workstation and the web server.