Test your basic knowledge |

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. CDP is running between two CK devices. What information is supplied by CDP?
An electrical pulse indicates that the collision has cleared.
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS
Device Identifiers - Capabilities list - Platform

2. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Data link
VTP
MAC Address and Bridge Priority
Buffering - Cut-through - and Congestion avoidance

3. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Decrease the window size.
The system is malfunctioning.
An additional broadcast domain will be created.
Auto - On - and Desirable

4. 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
An additional broadcast domain will be created.
Packet switching - Packet filtering and Internetwork communication.
It operates without collisions and It provides faster data transfer

5. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
A hub and A repeater.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VLAN and Swtich

6. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
Data link
Learning - Listening - and Forwarding
The network layer

7. 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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
To prevent switching loops in networks with redundant switched paths.
Network
The sequence number in the TCP header.

8. Which three of the protocols below belong to the application layer? (Select three answer choices)
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
Increased latency and Filtering of all frame errors
HTTPS - SMTP - and TFTP
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.

9. 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?
Application
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Configure the switch so that it has lower priority than other switches in the network
Information about a route should never be sent back in the direction from which the original update came.

10. 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
An electrical pulse indicates that the collision has cleared.

11. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Device Identifiers - Capabilities list - Platform
A cross-over cable
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

12. 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?
Device Identifiers - Capabilities list - Platform
Port security
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

13. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Port security
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.
The switch will forward the frame to a specific port
VTP

14. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
VTP
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.
Auto - On - and Desirable
Encapsulations PPP and authentication CHAP

15. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Sequence number - Window size - and Acknowledgment number
Auto - On - and Desirable
Configure the switch so that it has a lower priority than other switches in the network.
It is used to prevent switching loops in networks with redundant switched routes.

16. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
Auto - On - and Desirable
Sequence number - Window size - and Acknowledgment number
HTTPS
STP

17. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
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.
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
SMTP - FTP - HTTP - and HTTPS
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.

18. Which fields are included in the TCP header?
Transport
Encapsulations PPP and authentication CHAP
Source Port - Acknowledgment Number - and Window
Layer 4

19. Which OSI layer header contains the address of a destination host that is on another network?
SMTP FTP and HTTP
Duplex mismatch
ARP and ICMP
Network

20. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
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.
Layer 4
802.3ab and 802.3z

21. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
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
Application
Switches increase the number of collision domains in the network.
Layer 4

22. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
In an improperly implemented redundant topology
Network
The Bridgeg ID and The bridge priority

23. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Source Port - Acknowledgment Number - and Window
STP

24. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Duplex mismatch
Layer 4

25. 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
The port is experiencing errors
Learning - Listening - and Forwarding
Show arp and Show interface

26. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A broadcast address will never be the source address of a frame

27. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
100 meters
Configure the switch so that it has lower priority than other switches in the network
The sequence number in the TCP header.

28. 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?
Network
The interfaces must be configured for NAT.
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 domain with too many hosts - Broadcast storms - and Low bandwidth

29. 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
Network
The Bridgeg ID and The bridge priority

30. 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
HTTPS - SMTP - and TFTP
Source Port - Acknowledgment Number - and Window
Data link
A cross-over cable

31. 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?
The port is experiencing errors
TCP
100 meters
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

32. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
100 meters
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.
Path selections and Packet switching.

33. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Layer 4
802.1Q and ISL
Data link

34. 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
A cross-over cable
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
Layer 4

35. 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?
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
Switches increase the number of collision domains in the network.
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.
TCP

36. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
ARP and ICMP
Certkiller B > trace
Layer 3

37. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Show cdp neighbor detail
Duplex mismatch
Learning - Listening - and Forwarding

38. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Transport
Switches increase the number of collision domains in the network.
802.1Q and ISL

39. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Auto - On - and Desirable
Transport
Encapsulations PPP and authentication CHAP
Duplex mismatch

40. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different 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
VLAN and Swtich
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
Packet switching - Packet filtering and Internetwork communication.

41. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Switches increase the number of collision domains in the network.
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
Configure the switch so that it has a lower priority than other switches in the network.
100 meters

42. 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?
Show cdp neighbor detail
Layer 3
Information about a route should never be sent back in the direction from which the original update came.
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.

43. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
Buffering - Cut-through - and Congestion avoidance
Auto - On - and Desirable
Hosts use a logical bus topology
Increased latency and Filtering of all frame errors

44. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
MAC Address and Bridge Priority
Network
The network layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

45. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Switches - Bridges - and Routers
Increased latency and Filtering of all frame errors
In an improperly implemented redundant topology
Duplex mismatch

46. 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
Device Identifiers - Capabilities list - Platform
SMTP - FTP - HTTP - and HTTPS
Show arp and Show interface
A cross-over cable

47. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Certkiller B > trace
Network
Packet switching - Packet filtering and Internetwork communication.

48. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Congestion avoidance - Windowing and Buffering
Duplex mismatch
Switches increase the number of collision domains in the network.

49. 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?
An additional broadcast domain will be created.
The system is malfunctioning.
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.
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.

50. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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
The system is malfunctioning.
This is an Ethernet port operating at half duplex
Information about a route should never be sent back in the direction from which the original update came.