CCNA Practice Exam Questions and Answers with complete

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? - AnswerNetwork access layer Which protocol uses a connection-oriented service to deliver files between end systems? - AnswerFTP 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. How does TCP differ from UDP? - Answer-TCP provides sequence numbering of packets. TCP provides synchronized communication. A workstation has just resolved a browser URL to the IP address of a server. What protocol will the workstation now use to determine the destination MAC address to be placed into frames directed toward the server? - Answer-ARP What destination MAC address is used in the ARP request? - Answer-ff-ff-ff-ff-ff-ff What are two common TCP applications? - Answer-SMTP and FTP