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CCNA Practice Exam Questions and Answers Already Passed True statements about the operation of a full-duplex Ethernet network ✔✔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? ✔✔Network Layer Which layer of the TCP/IP stack combines the OSI model physical and data link layers? ✔✔Network access layer Which protocol uses a connection-oriented service to deliver files between end systems? ✔✔FTP What do switches do? ✔✔Prevent Ethernet Collisions, Create less collision domains. Mac Address ✔✔Physical Address, Layer 2 devices, Which network device functions only at Layer 1 of the OSI model? ✔✔Hub Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required? ✔✔UDP Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments? ✔✔Transport Layer True statements regarding ICMP packets ✔✔TRACERT uses ICMP packets. They are encapsulated within IP datagrams Statements that accurately describe CDP ✔✔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? ✔✔A switch tracks MAC addresses of directly-connected devices. What must occur before a workstation can exchange HTTP packets with a web server? ✔✔A TCP connection must be established between the workstation and the web server. How does TCP differ from UDP? ✔✔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? ✔✔ARP What destination MAC address is used in the ARP request? ✔✔ff-ff-ff-ff-ff-ff What are two common TCP applications? ✔✔SMTP and FTP Describe the operation of the CSMA/CD access method? ✔✔ The operation of the CSMA/CD access method ✔✔In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data. On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or from another vendor? ✔✔CDP At which layer of the OSI model does the protocol that provides the information that is displayed by the show cdp neighbors command operate? ✔✔data link Characteristics that apply to Layer 2 switches? ✔✔Decreases the number of collision domains and Implements VLAN. Which two characteristics describe the access layer of the hierarchical network design model? ✔✔Port security and vlans To what type of port would a cable with a DB-60 connector attach? ✔✔Serial port Types of flow control ✔✔cut-through, windowing & load balancing A switch receives a frame on one of its ports. There is no entry in the MAC address table for the destination MAC address. What will the switch do with the frame? A. drop the frame ✔✔forward it out of all ports except the one that received it What does a host on an Ethernet network do when it is creating a frame and it does not have the destination address? ✔✔Sends out an ARP request with the destination IP address [Show More]

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