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. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
Port security
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Sequence number - Window size - and Acknowledgment number

2. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Learning - Listening - and Forwarding
Layer 4
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Show arp and Show interface

3. 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?
Sequence number - Window size - and Acknowledgment number
A broadcast address will never be the source address of a frame
SMTP FTP and HTTP
802.3ab and 802.3z

4. 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
Encapsulations PPP and authentication CHAP
VLAN and Swtich
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 arp and Show interface

5. 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.)
MAC Address and Bridge Priority
The network layer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Encapsulations PPP and authentication CHAP

6. 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?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

7. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Switches - Bridges - and Routers

8. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
It is the sum of the costs based on bandwidth
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

9. 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
STP
Show cdp neighbor detail
A broadcast address will never be the source address of a frame

10. 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?
SMTP FTP and HTTP
HTTPS - SMTP - and TFTP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

11. 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 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.
ARP and ICMP
Sequence number - Window size - and Acknowledgment number
A hub and A repeater.

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?
Decrease the window size.
CertK Switch(config)# ip default-gateway 192.168.1.115
VTP
Physical Layer and Datalink Layer

13. 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?
Show arp and Show interface
To allow remote management of the switch.
MAC Address and Bridge Priority
Auto - On - and Desirable

14. By default - which of the following factors determines the spanning-tree path cost?
Layer 4
Serial0/1 is down - line protocol is down
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.
It is the sum of the costs based on bandwidth

15. 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
Buffering - Cut-through - and Congestion avoidance
Data link
CertK Switch(config)# ip default-gateway 192.168.1.115

16. 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
ARP and ICMP
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

17. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

18. 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?
This is an Ethernet port operating at half duplex
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
Device Identifiers - Capabilities list - Platform

19. 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 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.
Data link
STP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

20. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
HTTPS - SMTP - and TFTP
Application
Layer 3

21. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
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.
Transport

22. What is the purpose of the spanning-tree algorithm in a switched LAN?
STP
Decrease the window size.
To prevent switching loops in networks with redundant switched paths.
Layer 4

23. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Source Port - Acknowledgment Number - and Window
HTTPS - SMTP - and TFTP
SMTP FTP and HTTP
In an improperly implemented redundant topology

24. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Network
Decrease the window size.
Path selections and Packet switching.
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.

25. 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
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
HTTPS - SMTP - and TFTP

26. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
The port is experiencing errors
Packet switching - Packet filtering and Internetwork communication.
Show cdp neighbor detail
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

27. 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?
802.1Q and ISL
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.
Increased latency and Filtering of all frame errors
Fiber optic cable.

28. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Switches - Bridges - and Routers
Switches increase the number of collision domains in the network.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Data link

29. 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
Physical Layer and Datalink Layer
Layer 3
Telnet and FTP
The sequence number in the TCP header.

30. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
STP
Auto - On - and Desirable
Decrease the window size.
The interfaces must be configured for NAT.

31. Which of the following can lead to the contribution of LAN traffic congestion?
Learning - Listening - and Forwarding
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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Auto - Desirable - and On

32. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
ARP and ICMP
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
802.1Q and ISL

33. 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?
100 meters
The switch will forward the frame to a specific port
CertK Switch(config)# ip default-gateway 192.168.1.115
Application

34. Which of the protocols below use TCP at the transport layer?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP - FTP - HTTP - and HTTPS
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Increased latency and Filtering of all frame errors

35. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
STP
All switch and bridge ports are in either the forwarding or blocking state.
Switches increase the number of collision domains in the network.
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.

36. Which three of the protocols below belong to the application layer? (Select three answer choices)
HTTPS - SMTP - and TFTP
Telnet and FTP
It will prevent segment 1's broadcasts from getting to segment 2.
To allow remote management of the switch.

37. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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.
Layer 4
Information about a route should never be sent back in the direction from which the original update came.
Application

38. 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
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 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.
100 meters

39. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Port security
100 meters
VLAN and Swtich
A broadcast address will never be the source address of a frame

40. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
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.
CertK Switch(config)# ip default-gateway 192.168.1.115

41. 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 interfaces must be configured for NAT.
All switch and bridge ports are in either the forwarding or blocking state.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

42. 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
The port is experiencing errors
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
The interfaces must be configured for NAT.

43. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Data link
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
802.1Q and ISL

44. Which protocol uses TCP port 443 at layer 4?
HTTPS
An additional broadcast domain will be created.
Layer 3
The sequence number in the TCP header.

45. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Data link
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
It is used to prevent switching loops in networks with redundant switched routes.
To allow remote management of the switch.

46. CDP is running between two CK devices. What information is supplied by CDP?
Configure the switch so that it has lower priority than other switches in the network
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Device Identifiers - Capabilities list - Platform
Network

47. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
ARP and ICMP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A cross-over cable

48. 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
Data link
It will prevent segment 1's broadcasts from getting to segment 2.
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.

49. 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?
Buffering - Cut-through - and Congestion avoidance
Layer 4
TCP
An electrical pulse indicates that the collision has cleared.

50. 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?
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.