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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. 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?
Telnet and FTP
The network layer
Data link
The port is experiencing errors

2. 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?
Switches increase the number of collision domains in the network.
TCP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The switch will forward the frame to a specific port

3. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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
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.

4. 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.
Sequence number - Window size - and Acknowledgment number
802.3ab and 802.3z
CertK Switch(config)# ip default-gateway 192.168.1.115

5. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
802.3ab and 802.3z
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Switches - Bridges - and Routers

6. By default - which of the following factors determines the spanning-tree path cost?
Switches increase the number of collision domains in the network.
Layer 3
It is the sum of the costs based on bandwidth
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.

7. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
The sequence number in the TCP header.
VTP
Layer 4
It operates without collisions and It provides faster data transfer

8. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
VLAN and Swtich
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.
Transport

9. 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
Data link
Data link
The network layer
Serial0/1 is down - line protocol is down

10. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
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 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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Application

11. 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?
Transport
802.3ab and 802.3z
MAC Address and Bridge Priority
Layer 3

12. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
An additional broadcast domain will be created.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

13. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link
Encapsulations PPP and authentication CHAP

14. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Configure the switch so that it has a lower priority than other switches in the network.
Application
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The port is experiencing errors

15. 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?
In an improperly implemented redundant topology
Sequence number - Window size - and Acknowledgment number
Layer 4
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.

16. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Device Identifiers - Capabilities list - Platform
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 4
The system is malfunctioning.

17. 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?
HTTPS - SMTP - and TFTP
CertK Switch(config)# ip default-gateway 192.168.1.115
Data link
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.

18. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
Show cdp neighbor detail
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
The system is malfunctioning.

19. What are two characteristics of 'store and forward' switching?
Application
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 switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The port is experiencing errors

20. 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?
Switches increase the number of collision domains in the network.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
To allow remote management of the switch.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

21. 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
VLAN and Swtich
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
ARP and ICMP
Information about a route should never be sent back in the direction from which the original update came.

22. 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?
Packet switching - Packet filtering and Internetwork communication.
VTP
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.

23. 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?
Decrease the window size.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The Bridgeg ID and The bridge priority
Fiber optic cable.

24. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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25. Which of the following correctly describe the various functions and virtues of a router?
To prevent switching loops in networks with redundant switched paths.
The port is experiencing errors
Packet switching - Packet filtering and Internetwork communication.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

26. CDP is running between two CK devices. What information is supplied by CDP?
A broadcast address will never be the source address of a frame
An additional broadcast domain will be created.
Device Identifiers - Capabilities list - Platform
Duplex mismatch

27. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
An electrical pulse indicates that the collision has cleared.
In an improperly implemented redundant topology
Buffering - Cut-through - and Congestion avoidance
Network

28. Which of the following can lead to the contribution of LAN traffic congestion?
Serial0/1 is down - line protocol is down
Information about a route should never be sent back in the direction from which the original update came.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Configure the switch so that it has lower priority than other switches in the network

29. 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
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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Configure the switch so that it has a lower priority than other switches in the network.

30. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Configure the switch so that it has lower priority than other switches in the network
VTP
Switches - Bridges - and Routers

31. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
This is an Ethernet port operating at half duplex
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.
Layer 3
Duplex mismatch

32. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
The switch will forward the frame to a specific port
100 meters
Congestion avoidance - Windowing and Buffering

33. 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.
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

34. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
Configure the switch so that it has lower priority than other switches in the network
Learning - Listening - and Forwarding
Switches - Bridges - and Routers
Congestion avoidance - Windowing and Buffering

35. Which two of the following values does STP take into consideration when it elects the root bridge?
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 Bridgeg ID and The bridge priority
Telnet and FTP

36. 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
Show arp and Show interface
802.1Q and ISL
The interfaces must be configured for NAT.
To allow remote management of the switch.

37. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Configure the switch so that it has a lower priority than other switches in the network.
In an improperly implemented redundant topology
802.3ab and 802.3z
Application

38. Which of the protocols below use TCP at the transport layer?
HTTPS
SMTP - FTP - HTTP - and HTTPS
100 meters
The Bridgeg ID and The bridge priority

39. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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
802.3ab and 802.3z
Layer 4
Configure the switch so that it has lower priority than other switches in the network

40. 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?
An additional broadcast domain will be created.
HTTPS - SMTP - and TFTP
To allow remote management of the switch.
Certkiller B > trace

41. 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.)
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.
MAC Address and Bridge Priority
TCP
In an improperly implemented redundant topology

42. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
Telnet and FTP
To prevent switching loops in networks with redundant switched paths.
A cross-over cable
Physical Layer and Datalink Layer

43. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Transport
Data link
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Auto - Desirable - and On

44. What is the IEEE standard associated with Gigabit Ethernet?
Layer 3
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Source Port - Acknowledgment Number - and Window
802.3ab and 802.3z

45. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority
An additional broadcast domain will be created.
It will prevent segment 1's broadcasts from getting to segment 2.

46. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
VLAN and Swtich
HTTPS
Fiber optic cable.

47. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
VTP
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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The switch will forward the frame to a specific port

48. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
HTTPS
CertK Switch(config)# ip default-gateway 192.168.1.115
SMTP - FTP - HTTP - and HTTPS

49. 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?
The interfaces must be configured for NAT.
Switches increase the number of collision domains in the network.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
VTP will allow switches to share VLAN configuration information

50. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
SMTP - FTP - HTTP - and HTTPS
Serial0/1 is down - line protocol is down
Auto - On - and Desirable
Fiber optic cable.