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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Sequence number - Window size - and Acknowledgment number
This is an Ethernet port operating at half duplex
The port is experiencing errors

2. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Packet switching - Packet filtering and Internetwork communication.
Telnet and FTP
Switches increase the number of collision domains in the network.

3. Which of the protocols below use TCP at the transport layer?
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.
Source Port - Acknowledgment Number - and Window
SMTP - FTP - HTTP - and HTTPS
Data link

4. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
The network layer
Show cdp neighbor detail
Application
In an improperly implemented redundant topology

5. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
An additional broadcast domain will be created.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

6. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Serial0/1 is down - line protocol is down
Transport
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
An additional broadcast domain will be created.

7. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
Auto - On - and Desirable
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Layer 3

8. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Duplex mismatch
In an improperly implemented redundant topology

9. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
802.3ab and 802.3z
Network
Auto - On - and Desirable
Configure the switch so that it has a lower priority than other switches in the network.

10. Which of the following correctly describe the various functions and virtues of a router?
It operates without collisions and It provides faster data transfer
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.
Packet switching - Packet filtering and Internetwork communication.

11. 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?
An additional broadcast domain will be created.
The interfaces must be configured for NAT.
SMTP - FTP - HTTP - and HTTPS
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

12. 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?
Transport
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
VTP
Duplex mismatch

13. What kind of cable should be used to establish a trunked line between two Catalyst switches?
ARP and ICMP
Device Identifiers - Capabilities list - Platform
A cross-over cable
Auto - On - and Desirable

14. 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
The network layer
STP
Switches increase the number of collision domains in the network.
Configure the switch so that it has lower priority than other switches in the network

15. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The sequence number in the TCP header.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
STP
Data link

16. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Layer 3
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
100 meters

17. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
The network layer
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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 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.

18. 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 increase the number of collision domains in the network.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
100 meters
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

19. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Hosts use a logical bus topology
Auto - On - and Desirable
Show cdp neighbor detail

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?
STP
To allow remote management of the switch.
To prevent switching loops in networks with redundant switched paths.
Hosts use a logical bus topology

21. 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 system is malfunctioning.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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 cross-over cable

22. 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
The network layer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
802.1Q and ISL

23. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
802.3ab and 802.3z
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Physical Layer and Datalink Layer

24. Which fields are included in the TCP header?
ARP and ICMP
Network
Source Port - Acknowledgment Number - and Window
Information about a route should never be sent back in the direction from which the original update came.

25. 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?
Congestion avoidance - Windowing and Buffering
Show cdp neighbor detail
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Layer 4

26. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
It is the sum of the costs based on bandwidth
Switches increase the number of collision domains in the network.
In an improperly implemented redundant topology
Data link

27. 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)
CertK Switch(config)# ip default-gateway 192.168.1.115
Application
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

28. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Device Identifiers - Capabilities list - Platform

29. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
The network layer
ARP and ICMP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Layer 4

30. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
The system is malfunctioning.
Increased latency and Filtering of all frame errors
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.
This is an Ethernet port operating at half duplex

31. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
In an improperly implemented redundant topology
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.
It is used to prevent switching loops in networks with redundant switched routes.
VTP will allow switches to share VLAN configuration information

32. 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.)
VLAN and Swtich
MAC Address and Bridge Priority
Encapsulations PPP and authentication CHAP
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.

33. 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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34. By default - which of the following factors determines the spanning-tree path cost?
All switch and bridge ports are in either the forwarding or blocking state.
Auto - On - and Desirable
A broadcast address will never be the source address of a frame
It is the sum of the costs based on bandwidth

35. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
TCP
Layer 3
The sequence number in the TCP header.

36. 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
The network layer
Data link
VLAN and Swtich
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

37. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
To prevent switching loops in networks with redundant switched paths.
Layer 4
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Network

38. In a switched LAN network - What is the Spanning-Tree algorithm used for?
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.
STP
It is used to prevent switching loops in networks with redundant switched routes.

39. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
An additional broadcast domain will be created.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Fiber optic cable.
Information about a route should never be sent back in the direction from which the original update came.

40. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
SMTP FTP and HTTP
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
VTP will allow switches to share VLAN configuration information
An additional broadcast domain will be created.

41. 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 3
The network layer
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.

42. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.
Decrease the window size.
To allow remote management of the switch.

43. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
SMTP FTP and HTTP
It operates without collisions and It provides faster data transfer
Learning - Listening - and Forwarding

44. Which of the following correctly describe steps in the OSI date encapsulation process?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
It is used to prevent switching loops in networks with redundant switched routes.
In an improperly implemented redundant topology

45. 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
The Bridgeg ID and The bridge priority
A cross-over cable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The port is experiencing errors
Show arp and Show interface
TCP

47. 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
Decrease the window size.
SMTP - FTP - HTTP - and HTTPS
Encapsulations PPP and authentication CHAP

48. Which of the following are spanning tree port states?
TCP
Learning - Listening - and Forwarding
HTTPS - SMTP - and TFTP
To allow remote management of the switch.

49. 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?
100 meters
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
Fiber optic cable.
Configure the switch so that it has lower priority than other switches in the network

50. Which OSI layer header contains the address of a destination host that is on another network?
It is used to prevent switching loops in networks with redundant switched routes.
Serial0/1 is down - line protocol is down
VLAN and Swtich
Network

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