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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. 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.
Learning - Listening - and Forwarding
The system is malfunctioning.
Hosts use a logical bus topology

2. 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.
Telnet and FTP
Decrease the window size.
It will prevent segment 1's broadcasts from getting to segment 2.

3. 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?
Physical Layer and Datalink Layer
Serial0/1 is down - line protocol is down
Auto - Desirable - and On
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

4. Which OSI layer header contains the address of a destination host that is on another network?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Decrease the window size.
Network

5. 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
Hosts use a logical bus topology
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

6. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Packet switching - Packet filtering and Internetwork communication.
MAC Address and Bridge Priority
The network layer
802.1Q and ISL

7. 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?
100 meters
Show cdp neighbor detail
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The interfaces must be configured for NAT.

8. Which of the following are true of Ethernet technology?
Switches increase the number of collision domains in the network.
The network layer
VTP will allow switches to share VLAN configuration information
Hosts use a logical bus topology

9. 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?
STP
This is an Ethernet port operating at half duplex
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
Show cdp neighbor detail

10. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Congestion avoidance - Windowing and Buffering
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
Auto - On - and Desirable

11. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
100 meters
CertK Switch(config)# ip default-gateway 192.168.1.115
Switches - Bridges - and Routers

12. Which of the following correctly describe the various functions and virtues of a router?
Telnet and FTP
Packet switching - Packet filtering and Internetwork communication.
STP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

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?
Hosts use a logical bus topology
This is an Ethernet port operating at half duplex
Physical Layer and Datalink 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.

14. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Duplex mismatch
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
STP
Sequence number - Window size - and Acknowledgment number

15. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
100 meters
Show arp and Show interface
An electrical pulse indicates that the collision has cleared.

16. Which protocol uses TCP port 443 at layer 4?
HTTPS
STP
Switches increase the number of collision domains in the network.
Hosts use a logical bus topology

17. 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?
The Bridgeg ID and The bridge priority
VTP
Buffering - Cut-through - and Congestion avoidance
Serial0/1 is down - line protocol is down

18. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Transport
The sequence number in the TCP header.
In an improperly implemented redundant topology

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?
Telnet and FTP
Configure the switch so that it has lower priority than other switches in the network
Show cdp neighbor detail
Switches - Bridges - and Routers

20. By default - which of the following factors determines the spanning-tree path cost?
Telnet and FTP
Application
VTP will allow switches to share VLAN configuration information
It is the sum of the costs based on bandwidth

21. 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?
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS
Switches increase the number of collision domains in the network.
Sequence number - Window size - and Acknowledgment number

22. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Device Identifiers - Capabilities list - Platform
Auto - On - and Desirable
STP

23. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
Application
Fiber optic cable.
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

24. 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 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.
HTTPS
Duplex mismatch

25. 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 switch will forward the frame to a specific port
Configure the switch so that it has a lower priority than other switches in the network.
The network layer
Hosts use a logical bus topology

26. 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?
Auto - On - and Desirable
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
TCP
HTTPS

27. Which three of the protocols below belong to the application layer? (Select three answer choices)
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.
HTTPS - SMTP - and TFTP
Fiber optic cable.
Duplex mismatch

28. 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
The switch will forward the frame to a specific port
All switch and bridge ports are in either the forwarding or blocking state.
Fiber optic cable.
Duplex mismatch

29. 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?
The port is experiencing errors
ARP and ICMP
Information about a route should never be sent back in the direction from which the original update came.
It is the sum of the costs based on bandwidth

30. 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?
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.
Increased latency and Filtering of all frame errors
Application
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.

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
Duplex mismatch
In an improperly implemented redundant topology
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
Path selections and Packet switching.

32. 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?
Switches increase the number of collision domains in the network.
Device Identifiers - Capabilities list - Platform
Sequence number - Window size - and Acknowledgment number
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

33. Which two of the following values does STP take into consideration when it elects the root bridge?
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.
The Bridgeg ID and The bridge priority
Physical Layer and Datalink Layer

34. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
A hub and A repeater.
Fiber optic cable.
Auto - On - and Desirable
It is the sum of the costs based on bandwidth

35. 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?
Auto - On - and Desirable
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.
Application
CertK Switch(config)# ip default-gateway 192.168.1.115

36. What are two characteristics of 'store and forward' switching?
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
To allow remote management of the switch.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

37. 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
Configure the switch so that it has a lower priority than other switches in the network.
VTP
Data link
Transport

38. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
VLAN and Swtich
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.
Network

39. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Switches - Bridges - and Routers
Hosts use a logical bus topology
It operates without collisions and It provides faster data transfer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

40. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
100 meters
Information about a route should never be sent back in the direction from which the original update came.
TCP
Auto - Desirable - and On

41. 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
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.

42. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
CertK Switch(config)# ip default-gateway 192.168.1.115
Information about a route should never be sent back in the direction from which the original update came.
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

43. What is the purpose of the spanning-tree algorithm in a switched LAN?
Telnet and FTP
The sequence number in the TCP header.
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.
To prevent switching loops in networks with redundant switched paths.

44. 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
Transport
Sequence number - Window size - and Acknowledgment number
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

45. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Source Port - Acknowledgment Number - and Window
Encapsulations PPP and authentication CHAP
Layer 4
The port is experiencing errors

46. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Fiber optic cable.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Information about a route should never be sent back in the direction from which the original update came.
Certkiller B > trace

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?
Data link
MAC Address and Bridge Priority
Source Port - Acknowledgment Number - and Window
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

48. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Sequence number - Window size - and Acknowledgment number
Physical Layer and Datalink Layer
Transport
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

49. 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.)
Layer 4
A hub and A repeater.
MAC Address and Bridge Priority
802.1Q and ISL

50. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
Switches - Bridges - and Routers