parte 1

1 Which three statements are true about the operation of a full-duplex Ethernet network? (Choose three.). There are no collisions in full-duplex mode. A dedicated switch port is required for each full-duplex node. Ethernet hub ports are preconfigured for full-duplex mode. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting. The host network card and the switch port must be capable of operating in full-duplex mode.

2. SMTP. TCP. IP. ethernet. UDP. SMNP. ARP.

3. Which OSI layer header contains the address of a destination host that is on another network?. application. session. transport. network. data link. physical.

4. Which layer of the TCP/IP stack combines the OSI model physical and data link layers?. Internet layer. transport layer. application layer. network access layer.

5. Which protocol uses a connection-oriented service to deliver files between end systems?. TFTP. DNS. FTP. SNMP. RIP.

6. Refer to the exhibit. If the hubs in the graphic were replaced by switches, what would be virtually eliminated?. broadcast domains. repeater domains. Ethernet collisions. signal amplification. Ethernet broadcasts.

7. Refer to the exhibit. If host A sends an IP packet to host B, what will the source physical address be in the frame when it reaches host B?. 10.168.10.99. 10.168.11.88. A1:A1:A1:A1:A1:A1. B2:B2:B2:B2:B2:B2. C3:C3:C3:C3:C3:C3. D4:D4:D4:D4:D4:D4.

8. Refer to the exhibit. HostX is transferring a file to the FTP server. Point A represents the frame as it goes toward the Toronto router. What will the Layer 2 destination address be at this point?. abcd.1123.0045. 192.168.7.17. aabb.5555.2222. 192.168.1.1. abcd.2246.0035.

9. Which network device functions only at Layer 1 of the OSI model?. bridge. hub. NIC. router. switch.

10. Refer to the exhibit. The host in Kiev sends a request for an HTML document to the server in Minsk. What will be the source IP address of the packet as it leaves the Kiev router?. 10.1.0.1. 10.1.0.5. 10.1.0.6. 10.1.0.14. 10.1.1.16. 10.1.2.8.

11. Refer to the exhibit. As packets travel from Mary to Robert, which three devices will use the destination MAC address of the packet to determine a forwarding path? (Choose three.). Hub1. Switch1. Router1. Switch2. Router2. Switch3.

12 Refer to the exhibit. Mary is sending an instant message to Robert. The message will be broken into a series of packets that will traverse all network devices. What addresses will populate these packets as they are forwarded from Router1 to Router2?. A. B. C. D. E.

13. Refer to the exhibit. A network device needs to be installed in the place of the icon labeled Network Device to accommodate a leased line attachment to the Internet. Which network device and interface configuration meets the minimum requirements for this installation?. a router with two Ethernet interfaces. a switch with two Ethernet interfaces. a router with one Ethernet and one serial interface. a switch with one Ethernet and one serial interface. a router with one Ethernet and one modem interface.

14. Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required?. HTTP. IP. TCP. Telnet. UDP.

15. Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments?. Physical. Data-link. Transport. Network.

16 Which statements are true regarding ICMP packets? (Choose two.). They acknowledge receipt of TCP segments. They guarantee datagram delivery. TRACERT uses ICMP packets. They are encapsulated within IP datagrams. They are encapsulated within UDP datagrams.

17. Which statements accurately describe CDP? (Choose three.). CDP is an IEEE standard protocol. CDP is a Cisco proprietary protocol. CDP is a datalink layer protocol. CDP is a network layer protocol. CDP can discover directly connected neighboring Cisco devices. CDP can discover Cisco devices that are not directly connected.

18. How does a switch differ from a hub?. A switch does not induce any latency into the frame transfer time. A switch tracks MAC addresses of directly-connected devices. A switch operates at a lower, more efficient layer of the OSI model. A switch decreases the number of broadcast domains. A switch decreases the number of collision domains.

19. What must occur before a workstation can exchange HTTP packets with a web server?. A UDP connection must be established between the workstation and its default gateway. A UDP connection must be established between the workstation and the web server. A TCP connection must be established between the workstation and its default gateway. A TCP connection must be established between the workstation and the web server. An ICMP connection must be established between the workstation and its default gateway. An ICMP connection must be established between the workstation and the web server.

20. How does TCP differ from UDP? (Choose two.). TCP provides best effort delivery. TCP provides synchronized communication. TCP segments are essentially datagrams. TCP provides sequence numbering of packets. TCP uses broadcast delivery.

21. 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?. HTTP. DNS. DHCP. RARP. ARP.

22. Refer to the exhibit. Host A is sending a packet to Host B for the first time. What destination MAC address will Host A use in the ARP request?. 192.168.0.1. 172.16.0.50. 00-17-94-61-18-b0. 00-19-d3-2d-c3-b2. ff-ff-ff-ff-ff-ff. 255.255.255.255.

23. What are two common TCP applications? (Choose two.). TFTP. SMTP. SNMP. FTP. DNS.

24. Refer to the exhibit. SwitchA receives the frame with the addressing shown. According to the command output also shown in the exhibit, how will SwitchA handle this frame?. It will drop the frame. It will forward the frame out port Fa0/6 only. It will flood the frame out all ports. It will flood the frame out all ports except Fa0/3.

25. Refer to the exhibit. SwitchA receives the frame with the addressing shown in the exhibit. According to the command output also shown in the exhibit, how will SwitchA handle this frame?. It will drop the frame. It will forward the frame out port Fa0/6 only. It will forward the frame out port Fa0/3 only. It will flood the frame out all ports. It will flood the frame out all ports except Fa0/3.

26. Refer to the exhibit. The exhibit is showing the topology and the MAC address table. Host A sends a data frame to host D. What will the switch do when it receives the frame from host A?. The switch will add the source address and port to the MAC address table and forward the frame to host D. The switch will discard the frame and send an error message back to host A. The switch will flood the frame out of all ports except for port Fa0/3. The switch will add the destination address of the frame to the MAC address table and forward the frame to host D.

27. Which two statements describe the operation of the CSMA/CD access method? (Choose two.). In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method. After a collision, the station that detected the collision has first priority to resend the lost data. 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. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.

28. Refer to the exhibit. A network has been planned as shown. Which three statements accurately describe the areas and devices in the network plan? (Choose three.). Network Device A is a switch. Network Device B is a switch. Network Device A is a hub. Network Device B is a hub. Area 1 contains a Layer 2 device. Area 2 contains a Layer 2 device.

29. On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or from another vendor?. RTP. TCP. CDP. UDP.

30. Refer to the exhibit. What must be configured to establish a successful connection from Host A to switch SW-A through router RT-A?. VLAN 1 on RT-A. IP routing on SW-A. default gateway on SW-A. crossover cable connecting SW-A and RT-A.

31. At which layer of the OSI model does the protocol that provides the information that is displayed by the show cdp neighbors command operate?. application. transport. network. physical. data link.

32. Which two characteristics apply to Layer 2 switches? (Choose two.). increases the number of collision domains. decreases the number of collision domains. implements VLAN. decreases the number of broadcast domains. uses the IP address to make decisions for forwarding data packets.

33. Which two characteristics describe the access layer of the hierarchical network design model? (Choose two.). layer 3 support. port security. redundant components. VLANs. PoE.

34. Refer to the topology and switching table shown in the graphic. Host B sends a frame to Host C. What will the switch do with the frame?. drop the frame. send the frame out all ports except port 0/2. return the frame to Host B. send an ARP request for Host C. send an ICMP Host Unreachable message to Host B. record the destination MAC address in the switching table and send the frame directly to Host C.

35. Which two options will help to solve the problem of a network that is suffering a broadcast storm? (Choose two.). a bridge. a router. a hub. a Layer 3 switch. an access point.

36. 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?. drop the frame. forward it out of all ports except the one that received it. forward it out of all ports. store it until it learns the correct port.

37. Which address type does a switch use to make selective forwarding decisions?. source IP address. destination IP address. source and destination IP address. source MAC address. destination MAC address.

38. Refer to the exhibit. The MAC address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch. What two operations will the switch perform when it receives this frame? (Choose two.). The switch will not forward a frame with this destination MAC address. The MAC address of 0000.00aa.aaaa will be added to the MAC Address Table. The MAC address of ffff.ffff.ffff will be added to the MAC address table. The frame will be forwarded out all active switch ports except for port fa0/0. The frame will be forwarded out fa0/0 and fa0/1 only. The frame will be forwarded out all the ports on the switch.

39. What does a host on an Ethernet network do when it is creating a frame and it does not have the destination address?. drops the frame. drops the frame. sends a message to the router requesting the address. sends out an ARP request with the destination IP address.

40. A switch has 48 ports and 4 VLANs. How many collision and broadcast domains exist on the switch (collision, broadcast)?. 4, 48. 48, 4. 48, 1. 1, 48. 4, 1.

41. Refer to the exhibit. All devices attached to the network are shown. How many collision domains are present in this network?. 2. 3. 6. 9. 15.

42. Refer to the exhibit. The ports that are shown are the only active ports on the switch. The MAC address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch. What two operations will the switch perform when it receives this frame? (Choose two.). The MAC address of 0000.00aa.aaaa will be added to the MAC address table. The MAC address of 0000.00dd.dddd will be added to the MAC address table. The frame will be forwarded out port fa0/3 only. The frame will be forwarded out fa0/1, fa0/2, and fa0/3. The frame will be forwarded out all the active ports.

43. Which IP addresses are valid for hosts belonging to the 10.1.160.0/20 subnet? (Choose three.). 10.1.168.0. 10.1.176.1. 10.1.174.255. 10.1.160.255. 10.1.160.0. 10.1.175.255.

44. Given an IP address of 192.168.1.42 255.255.255.248, what is the subnet address?. 192.168.1.8/29. 192.168.1.32/27. 192.168.1.40/29. 192.168.1.16/28. 192.168.1.48/29.

45. Refer to the exhibit. The enterprise has decided to use the network address 172.16.0.0. The network administrator needs to design a classful addressing scheme to accommodate the three subnets, with 30, 40 and 50 hosts, as shown. What subnet mask would accommodate this network?. 255.255.255.192. 255.255.255.224. 255.255.255.240. 255.255.255.248. 255.255.255.252.

46. Which two statements describe the IP address 10.16.3.65/23? (Choose two.). The subnet address is 10.16.3.0 255.255.254.0. The lowest host address in the subnet is 10.16.2.1 255.255.254.0. The last valid host address in the subnet is 10.16.2.254 255.255.254.0. The broadcast address of the subnet is 10.16.3.255 255.255.254.0. The network is not subnetted.

47. Given a Class C IP address subnetted with a /30 subnet mask, how many valid host IP addresses are available on each of the subnets?. 1. 2. 4. 8. 252. 254.

48. Which one of the following IP addresses is the last valid host in the subnet using mask 255.255.255.224?. 192.168.2.63. 192.168.2.62. 192.168.2.61. 192.168.2.60. 192.168.2.32.

49. What is the subnet address for the IP address 172.19.20.23/28?. 172.19.20.0. 172.19.20.15. 172.19.20.16. 172.19.20.20. 172.19.20.32.

50. What is the subnet address of 172.16.159.159/22?. 172.16.0.0. 172.16.128.0. 172.16.156.0. 172.16.159.0. 172.16.159.128. 172.16.192.0.

51. An administrator is working with the 192.168.4.0 network, which has been subnetted with a /26 mask. Which two addresses can be assigned to hosts within the same subnet? (Choose two.). 192.168.4.61. 192.168.4.63. 192.168.4.67. 192.168.4.125. 192.168.4.128. 192.168.4.132.

52Refer to the exhibit. The internetwork is using subnets of the address 192.168.1.0 with a subnet mask of 255.255.255.224. The routing protocol in use is RIP version 1. Which address could be assigned to the FastEthernet interface on RouterA?. 192.168.1.31. 192.168.1.64. 192.168.1.127. 192.168.1.190. 192.168.1.192.

53. What is the network address for the host with IP address 192.168.23.61/28?. 192.168.23.0. 192.168.23.32. 192.168.23.48. 192.168.23.56. 192.168.23.60.

54. The network manager has requested a 300-workstation expansion of the network. The workstations are to be installed in a single broadcast domain, but each workstation must have its own collision domain. The expansion is to be as cost-effective as possible while still meeting the requirements. Which three items will adequately fulfill the request? (Choose three). one IP subnet with a mask of 255.255.254.0. two IP subnets with a mask of 255.255.255. seven 48-port hubs. seven 48-portswitches. one router interface. seven router interfaces.

55. What is the purpose of assigning an IP address to a switch?. provides local hosts with a default gateway address. allows remote management of the switch. allows the switch to respond to ARP requests between two hosts. ensures that hosts on the same LAN can communicate with each other.

56. What two things does a router do when it forwards a packet? (Choose two.). switches the packet to the appropriate outgoing interfaces. computes the destination host address. determines the next hop on the path. updates the destination IP address. forwards ARP requests.

57. Refer to the exhibit. What is the simplest way to configure routing between the regional office network 10.89.0.0/20 and the corporate network?. router1(config)#ip route 10.89.0.0 255.255.240.0 10.89.16.2. router2(config)#ip route 10.89.3.0 255.255.0.0 10.89.16.2. router1(config)#ip route 10.89.0.0 255.255.240.0 10.89.16.1. router2(config)#ip route 0.0.0.0 0.0.0.0 10.89.16.1.

58. Refer to the exhibit. Which command would you use to configure a static route on Router1 to network 192.168.202.0/24 with a nondefault administrative distance?. router1(config)#ip route 1 192.168.201.1 255.255.255.0 192.168.201.2. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 1. router1(config)#ip route 5 192.168.202.0 255.255.255.0 192.168.201.2. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 5.

59. What does administrative distance refer to?. the cost of a link between two neighboring routers. the advertised cost to reach a network. the cost to reach a network that is administratively set. a measure of the trustworthiness of a routing information source.

60. Which IOS command is used to initiate a login into a VTY port on a remote router?. router# login. router# telnet. router# trace. router# ping. router(config)# line vty 0 5. router(config-line)# login.

61. The command ip route 192.168.100.160 255.255.255.224 192.168.10.2 was issued on a router.No routing protocols or other static routes are configured on the router. Which statement is true about this command?. The interface with IP address 192.168.10.2 is on this router. The command sets a gateway of last resort for the router. Packets that are destined for host 192.168.100.160 will be sent to 192.168.10.2. The command creates a static route for all IP traffic with the source address 192.168.100.160.

62. Which two of these functions do routers perform on packets? (Choose two.). Examine the Layer 2 headers of inbound packets and use that information to determine the next hops for the packets. Update the Layer 2 headers of outbound packets with the MAC addresses of the next hops. Examine the Layer 3 headers of inbound packets and use that information to determine the next hops for the packets. Examine the Layer 3 headers of inbound packets and use that information to determine the complete paths along which the packets will be routed to their ultimate destinations. Update the Layer 3 headers of outbound packets so that the packets are properly directed to valid next hops. Update the Layer 3 headers of outbound packets so that the packets are properly directed to their ultimate destinations.

63. Refer to the exhibit. Which two statements are correct? (Choose two.). This is a default route. Adding the subnet mask is optional for the ip route command. This will allow any host on the 172.16.1.0 network to reach all known destinations beyond RouterA. This command is incorrect, it needs to specify the interface, such as s0/0/0 rather than an IP address. The same command needs to be entered on RouterA so that hosts on the 172.16.1.0 network can reach network 10.0.0.0.

64. Refer to the exhibit. If CDP is enabled onall devices and interfaces, which devices will appear in the output of a show cdp neighbors command issued from R2?. R2 and R3. R1 and R3. R3 and S2. R1, S1, S2, and R3. R1, S1, S2, R3, and S3.

65. Refer to the exhibit. The two routers have had their startup configurations cleared and have beenrestarted. At a minimum, what must the administrator do to enable CDP to exchange information between R1 and R2?. Configure the router with the cdp enable command. Enter no shutdown commands on the R1 and R2 fa0/1 interfaces. Configure IP addressing and no shutdown commands on both the R1 and R2 fa0/1 interfaces. Configure IP addressing and no shutdown commands on either of the R1 or R2 fa0/1 interfaces.

66. Which two commands will display the current IP address and basic Layer 1 and 2 status of an interface? (Choose two.). router#show version. router#show ip interface. router#show protocols. router#show controllers. router#show running-config.

67. An administrator is in the process of changing the configuration of a router. What command will allow the administrator to check the changes that have been made prior to saving the new configuration?. Router# show startup-config. Router# show current-config. Router# show running-config. Router# show memory. Router# show flash. Router# show processes.

68. On a live network, which commands will verify the operational status ofrouter interfaces?(Choose two.). Router# show interfaces. Router# show ip protocols. Router# debug interface. Router# show ip interface brief. Router# show start.

69. Which router command will configure an interface with the IP address 10.10.80.1/19?. router(config-if)# ip address 10.10.80.1/19. router(config-if)# ip address 10.10.80.1 255.255.0.0. router(config-if)# ip address 10.10.80.1 255.255.255.0. router(config-if)# ip address 10.10.80.1 255.255.224.0. router(config-if)# ip address 10.10.80.1 255.255.240.0. router(config-if)# ip address 10.10.80.1 255.255.255.240.

70. Refer to the exhibit. If the resume command is entered after the sequence that is shown in the exhibit, which router prompt will be displayed?. Router1>. Router1#. Router2>. Router2#.

71. What is the best practice when assigning IP addresses in a small office of six hosts?. Use a DHCP server that is located at the headquarters. Use a DHCP server that is located at the branch office. Assign the addresses by using the local CDP protocol. Assign the addresses statically on each node.

72. Refer to the exhibit. Which default gateway address should be assigned to HostA?. 192.168.1.1. 192.168.1.65. 192.168.1.66. 192.168.1.129. 10.1.1.1. 10.1.1.2.

73. ICMP. DHCP. RARP. UDP. DNS. ARP.

74. OSPF. ARP. NAT. DNS. SQL. DHCP.

75. a protocol thats converts human-readable names into machines-readable addresses. used to assign IP address automatically and set parameters such as subnet mask and default gateway. a protocol for using HTTP or HTTPS to exchange XML-based menssages over computer networks. a connectionless service that uses UDP to tranfer files between systems. a protocol used to monitor and manage network devices. a reliable, connection-oriented services that uses TCP to tranfer files between systems.

76. In the configuration of NAT, what does the keyword overload signify?. When bandwidth is insufficient, some hosts will not be allowed to access network translation. The pool of IP addresses has been exhausted. Multiple internal hosts will use one IP address to access external network resources. If the number of available IP addresses is exceeded, excess traffic will use the specified address pool.

77. What happens when computers on a private network attempt to connect to the Internet through a Cisco router running PAT?. The router uses the same IP address but a different TCP source port number for each connection. An IP address is assigned based on the priority of the computer requesting the connection. The router selects an address from a pool of one-to-one address mappings held in the lookup table. The router assigns a unique IP address from a pool of legally registered addresses for the duration of the connection.

78. Whenconfiguring NAT, the Internet interface is considered to be what?. local. inside. global. outside.

79. The ip helper-address command does what?. assigns an IP address to a host. resolves an IP address from a DNS server. relays a DHCP request across networks. resolves an IP address overlapping issue.

80. Refer to the exhibit. The network administrator made the entries that are shown and then saved the configuration. From a console connection, what password or password sequence is required for the administrator to access privileged mode on Router1?. cisco. sanfran. sanjose. either cisco or sanfran. either cisco or sanjose. sanjose and sanfran.