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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
SMTP FTP and HTTP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Auto - Desirable - and On

2. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Duplex mismatch
Configure the switch so that it has a lower priority than other switches in the network.
Switches increase the number of collision domains in the network.

3. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
VTP will allow switches to share VLAN configuration information
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Layer 4
TCP

4. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
The Bridgeg ID and The bridge priority
Transport
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The switch will forward the frame to a specific port

5. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Encapsulations PPP and authentication CHAP
Physical Layer and Datalink Layer
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
Certkiller B > trace

6. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
SMTP FTP and HTTP
Layer 4
VTP will allow switches to share VLAN configuration information
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.

7. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
The network layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Source Port - Acknowledgment Number - and Window

8. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
Auto - On - and Desirable
An electrical pulse indicates that the collision has cleared.
Fiber optic cable.
802.1Q and ISL

9. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
Layer 4
VTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

10. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Increased latency and Filtering of all frame errors
Decrease the window size.

11. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
Packet switching - Packet filtering and Internetwork communication.
All switch and bridge ports are in either the forwarding or blocking state.
Source Port - Acknowledgment Number - and Window
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.

12. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
To allow remote management of the switch.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Show arp and Show interface

13. Which of the following services use TCP?
The interfaces must be configured for NAT.
Encapsulations PPP and authentication CHAP
SMTP FTP and HTTP
Application

14. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
VLAN and Swtich
The interfaces must be configured for NAT.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to

15. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
It will prevent segment 1's broadcasts from getting to segment 2.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Source Port - Acknowledgment Number - and Window
Show arp and Show interface

16. Which of the following can lead to the contribution of LAN traffic congestion?
VTP
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A broadcast address will never be the source address of a frame

17. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
Port security
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
A broadcast address will never be the source address of a frame

18. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Data link
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
A cross-over cable
Transport

19. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
Data link
A broadcast address will never be the source address of a frame
The switch will forward the frame to a specific port
Congestion avoidance - Windowing and Buffering

20. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
Decrease the window size.
A broadcast address will never be the source address of a frame
An additional broadcast domain will be created.
Sequence number - Window size - and Acknowledgment number

21. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
To prevent switching loops in networks with redundant switched paths.
To allow remote management of the switch.
The interfaces must be configured for NAT.
Configure the switch so that it has lower priority than other switches in the network

22. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
Port security
MAC Address and Bridge Priority

23. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
Show arp and Show interface
SMTP FTP and HTTP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

24. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
802.1Q and ISL
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
Sequence number - Window size - and Acknowledgment number

25. Which protocol uses TCP port 443 at layer 4?
VTP
In an improperly implemented redundant topology
Application
HTTPS

26. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
Show cdp neighbor detail
100 meters
To prevent switching loops in networks with redundant switched paths.

27. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
The network layer
Show arp and Show interface
MAC Address and Bridge Priority
It operates without collisions and It provides faster data transfer

28. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
SMTP - FTP - HTTP - and HTTPS
Layer 4
An additional broadcast domain will be created.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

29. Which OSI layer header contains the address of a destination host that is on another network?
Certkiller B > trace
Network
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.

30. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
CertK Switch(config)# ip default-gateway 192.168.1.115
Telnet and FTP
Switches increase the number of collision domains in the network.
MAC Address and Bridge Priority

31. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
It is the sum of the costs based on bandwidth
Telnet and FTP
Switches increase the number of collision domains in the network.
The network layer

32. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Layer 4
Telnet and FTP
Data link
SMTP - FTP - HTTP - and HTTPS

33. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
An electrical pulse indicates that the collision has cleared.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has a lower priority than other switches in the network.
Certkiller B > trace

34. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
802.1Q and ISL
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

35. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
Layer 4
Sequence number - Window size - and Acknowledgment number
The switch will forward the frame to a specific port
Layer 3

36. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
ARP and ICMP
Physical Layer and Datalink Layer
Configure the switch so that it has lower priority than other switches in the network
Fiber optic cable.

37. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Information about a route should never be sent back in the direction from which the original update came.
An additional broadcast domain will be created.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It operates without collisions and It provides faster data transfer

38. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Device Identifiers - Capabilities list - Platform
Encapsulations PPP and authentication CHAP
A cross-over cable
It will prevent segment 1's broadcasts from getting to segment 2.

39. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
VLAN and Swtich
The port is experiencing errors
Encapsulations PPP and authentication CHAP
Switches increase the number of collision domains in the network.

40. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
The sequence number in the TCP header.
The interfaces must be configured for NAT.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VTP

41. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
To allow remote management of the switch.
Show cdp neighbor detail
An electrical pulse indicates that the collision has cleared.
TCP

42. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
VTP will allow switches to share VLAN configuration information
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
Fiber optic cable.

43. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
VTP
TCP
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.

44. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
Hosts use a logical bus topology
The port is experiencing errors
Path selections and Packet switching.
HTTPS - SMTP - and TFTP

45. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
The sequence number in the TCP header.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP FTP and HTTP
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.

46. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Sequence number - Window size - and Acknowledgment number
Physical Layer and Datalink Layer
Auto - On - and Desirable
Auto - Desirable - and On

47. Which three of the protocols below belong to the application layer? (Select three answer choices)
ARP and ICMP
HTTPS - SMTP - and TFTP
A hub and A repeater.
A broadcast address will never be the source address of a frame

48. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
MAC Address and Bridge Priority
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
In an improperly implemented redundant topology
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

49. Which fields are included in the TCP header?
Information about a route should never be sent back in the direction from which the original update came.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
Source Port - Acknowledgment Number - and Window
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

50. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data network?
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
Layer 4
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP