CCNA Practice Exam Questions And Answers With Verified Updates

Which OSI layer header contains the address of a destination host that is on another network? - Network Layer 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 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 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 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. Describe the operation of the CSMA/CD access method? - How does a switch differ from a hub? - A switch tracks MAC addresses of directly-connected devices. How does TCP differ from UDP? - TCP provides sequence numbering of packets. TCP provides synchronized communication.Mac Address - Physical Address, Layer 2 devices, On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or from another vendor? - CDP 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. To what type of port would a cable with a DB-60 connector attach? - Serial port 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. Types of flow control - cut-through, windowing & load balancing What are two common TCP applications? - SMTP and FTP What destination MAC address is used in the ARP request? - ff-ff-ff-ff-ff-ff What do switches do? - Prevent Ethernet Collisions, Create less collision domains. 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