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ccna

Terms in this set (128)

What two ICMPv6 message types must be permitted through IPv6 access control lists to allow resolution of Layer 3 addresses to Layer 2 MAC addresses? (Choose two.)
neighbor advertisements
neighbor solicitations
2. Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FE80::/10
3. What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 when the interface ID is generated by using the EUI-64 process?
1E6F:65FF:FEC2:BDF8
4. An organization is assigned an IPv6 address block of 2001:db8:0:ca00::/56. How many subnets can be created without using bits in the interface ID space?
256
5. Refer to the exhibit. If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?
BB:BB:BB:BB:BB:BB
6. When a switch configuration includes a user-defined error threshold on a per-port basis, to which switching method will the switch revert when the error threshold is reached?
store-and-forward
7. Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)
Destination IP addresses in a packet header remain constant along the entire path to a target host.

Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.
8. What is one main characteristic of the data link layer?
It shields the upper layer protocol from being aware of the physical medium to be used in the communication.
9. What are three characteristics of the CSMA/CD process? (Choose three.)
1. A device listens and waits until the media is not busy before transmitting.
2.After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired.
3.All of the devices on a segment see data that passes on the network medium.
10. What are two primary responsibilities of the Ethernet MAC sublayer? (Choose two.)
data encapsulation
accessing the media
11. Which two commands can be used on a Windows host to display the routing table? (Choose two.)
route print
netstat -r
12. What are two functions that are provided by the network layer? (Choose two.)
directing data packets to destination hosts on other networks
providing end devices with a unique network identifier
13. Which two statements describe features of an IPv4 routing table on a router? (Choose two.)​
Directly connected interfaces will have two route source codes in the routing table: C and S.
If a default static route is configured in the router, an entry will be included in the routing table with source code S.
14. How does the service password-encryption command enhance password security on Cisco routers and switches?
It encrypts passwords that are stored in router or switch configuration files.
15. Why would a Layer 2 switch need an IP address?
to enable the switch to be managed remotely
16. What characteristic describes identity theft?
the use of stolen credentials to access private data
18. A user sends an HTTP request to a web server on a remote network. During encapsulation for this request, what information is added to the address field of a frame to indicate the destination?
the MAC address of the default gateway
19. Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.)
1 The source port field identifies the running application or service that will handle data returning to the PC.
2 UDP segments are encapsulated within IP packets for transport across the network.
3 The UDP destination port number identifies the application or service on the server which will handle the data.
23. A network administrator wants to have the same subnet mask for three subnetworks at a small site. The site has the following networks and numbers of devices:

Subnetwork A: IP phones - 10 addresses Subnetwork B: PCs - 8 addresses Subnetwork C: Printers - 2 addresses
What single subnet mask would be appropriate to use for the three subnetworks?
255.255.255.240
25. What two pieces of information are displayed in the output of the show ip interface brief command? (Choose two.)
IP addresses
Layer 1 statuses
26. A user is complaining that an external web page is taking longer than normal to load.The web page does eventually load on the user machine. Which tool should the technician use with administrator privileges in order to locate where the issue is in the network?
tracert
27. A network technician is researching the use of fiber optic cabling in a new technology center. Which two issues should be considered before implementing fiber optic media? (Choose two.)
Fiber optic cabling requires different termination and splicing expertise from what copper cabling requires.
Fiber optic provides higher data capacity but is more expensive than copper cabling.
28. What technique is used with UTP cable to help protect against signal interference from crosstalk?
twisting the wires together into pairs
29. A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)
interference
security
coverage area
31. Users report that the network access is slow. After questioning the employees, the network administrator learned that one employee downloaded a third-party scanning program for the printer. What type of malware might be introduced that causes slow performance of the network?
worm
32. Which scenario describes a function provided by the transport layer?
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
34. What does the term "attenuation" mean in data communication?
loss of signal strength as distance increases
35. Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?
The administrator must first enter privileged EXEC mode before issuing the command.
36. Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
POP
DNS
37. A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework?
authorization
38. What three requirements are defined by the protocols used in network communcations to allow message transmission across a network? (Choose three.)
delivery options
message size
message encoding
39. What are two characteristics of IP? (Choose two.)
does not require a dedicated end-to-end connection
operates independently of the network media
An employee of a large corporation remotely logs into the company using the appropriate username and password. The employee is attending an important video conference with a customer concerning a large sale. It is important for the video quality to be excellent during the meeting. The employee is unaware that after a successful login, the connection to the company ISP failed. The secondary connection, however, activated within seconds. The disruption was not noticed by the employee or other employees.What three network characteristics are described in this scenario? (Choose three.)
fault tolerance
security
quality of service
41. What are two common causes of signal degradation when using UTP cabling? (Choose two.)
low-quality cable or connectors
improper termination
42. Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
44. Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer? (Choose two.)
Capture traffic during peak utilization times to get a good representation of the different traffic types.

Perform the capture on different network segments.
45. What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?​
The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages.
46. Which three layers of the OSI model map to the application layer of the TCP/IP model? (Choose three.)
application
session
presentation
47. Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?
remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0
48. What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks.
49. What are two features of ARP? (Choose two.)
If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.

If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.
50. A network administrator is adding a new LAN to a branch office. The new LAN must support 90 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.128
51. What are two ICMPv6 messages that are not present in ICMP for IPv4? (Choose two.)
'Router Advertisement
Neighbor Solicitation
52. A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?
HTTP
53. What is an advantage for small organizations of adopting IMAP instead of POP?
Messages are kept in the mail servers until they are manually deleted from the email client.
54. A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?
nslookup
55. Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
enables IPv4 and IPv6 to utilize the same physical medium
places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
applies source and destination MAC addresses to Ethernet frame
handles communication between upper layer networking software and Ethernet NIC hardware
adds Ethernet control information to network protocol data
adds Ethernet control information to network protocol data
places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
enables IPv4 and IPv6 to utilize the same physical medium
adds Ethernet control information to network protocol data
enables IPv4 and IPv6 to utilize the same physical medium
handles communication between upper layer networking software and Ethernet NIC hardware
56. The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?
The switch can be remotely managed from a host on another network.
57. What happens when the transport input ssh command is entered on the switch vty lines?
Communication between the switch and remote users is encrypted.
59. A disgruntled employee is using some free wireless networking tools to determine information about the enterprise wireless networks. This person is planning on using this information to hack the wireless network. What type of attack is this?
reconnaissance
60. What service is provided by HTTP?
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.
61. A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
DHCP
62. What are two problems that can be caused by a large number of ARP request and reply messages? (Choose two.)
The ARP request is sent as a broadcast, and will flood the entire subnet.
All ARP request messages must be processed by all nodes on the local network.
63. A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information? (Choose three.)
ping
ipconfig
nslookup
64. During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?
switch the packet to the directly connected interface
65. What characteristic describes antispyware?
applications that protect end devices from becoming infected with malicious software
66. A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?
SSH
67. What are the two most effective ways to defend against malware? (Choose two.)
Update the operating system and other application software.
Install and update antivirus software.
68. Which type of security threat would be responsible if a spreadsheet add-on disables the local software firewall?
Trojan horse
69. Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss?
frame check sequence field
70. A network administrator is adding a new LAN to a branch office. The new LAN must support 4 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.248
71. What service is provided by POP3?
Retrieves email from the server by downloading the email to the local mail application of the client.
72. What two security solutions are most likely to be used only in a corporate environment? (Choose two.)
virtual private networks
intrusion prevention systems
73. What characteristic describes antivirus software?
applications that protect end devices from becoming infected with malicious software
74. What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?
It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.
75. A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?
TFTP
76. An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections? (Choose three.)
Configure the IP domain name on the router.
Generate the SSH keys.
Enable inbound vty SSH sessions.
77. Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame
implements trailer with frame check sequence for error detection
integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper
implements CSMA/CD over legacy shared half-duplex media
applies source and destination MAC addresses to Ethernet frame
78. An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet?​
all IPv6 configured routers on the local link​
79. What are the three parts of an IPv6 global unicast address? (Choose three.)
subnet ID
global routing prefix
interface ID
80. A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?
It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
81. A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?
Exit privileged EXEC mode and press Enter .
82. What method is used to manage contention-based access on a wireless network?
CSMA/CA
83. What is a function of the data link layer?
provides for the exchange of frames over a common local media
84. What is the purpose of the TCP sliding window?
to request that a source decrease the rate at which it transmits data
85. What characteristic describes spyware?
software that is installed on a user device and collects information about the user
86. Which switching method drops frames that fail the FCS check?
store-and-forward switching
87. Two pings were issued from a host on a local network. The first ping was issued to the IP address of the default gateway of the host and it failed. The second ping was issued to the IP address of a host outside the local network and it was successful. What is a possible cause for the failed ping?
Security rules are applied to the default gateway device, preventing it from processing ping requests.
88. What service is provided by FTP?
Allows for data transfers between a client and a file server.
89. A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)
DNS server
default gateway
90. Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network? (Choose two.)
NAT introduces problems for some applications that require end-to-end connectivity.
NAT provides a solution to slow down the IPv4 address depletion.
91. What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?
255.255.255.192
92. Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next?
PC2 will send an ARP reply with its MAC address.
93. What service is provided by BOOTP?
Legacy application that enables a diskless workstation to discover its own IP address and find a BOOTP server on the network.
94. What characteristic describes adware?
software that is installed on a user device and collects information about the user
95. What is a benefit of using cloud computing in networking?
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.
97. Which information does the show startup-config command display?
the contents of the saved configuration file in the NVRAM
100. What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
2001:DA48:FC5:A4::/64​
102. Users are reporting longer delays in authentication and in accessing network resources during certain time periods of the week. What kind of information should network engineers check to find out if this situation is part of a normal network behavior?
the network performance baseline
103. What characteristic describes a VPN?
a tunneling protocol that provides remote users with secure access into the network of an organization
104. Which two statements are correct in a comparison of IPv4 and IPv6 packet headers? (Choose two.)
The Source Address field name from IPv4 is kept in IPv6.
The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6.
05. A network administrator wants to have the same network mask for all networks at a particular small site. The site has the following networks and number of devices:IP phones - 22 addressesPCs - 20 addresses neededPrinters - 2 addresses neededScanners - 2 addresses needed
The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?
255.255.255.224
106. What is an advantage to using a protocol that is defined by an open standard?
It encourages competition and promotes choices.
107. A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.0
108. What are three commonly followed standards for constructing and installing cabling? (Choose three.)
cable lengths
pinouts
connector types
111. A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?
use of checksum
port numbering
113. Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
Time-to-Live
114. A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?
FTP
115. What attribute of a NIC would place it at the data link layer of the OSI model?
MAC address
116. A network administrator is adding a new LAN to a branch office. The new LAN must support 10 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.240
117. A user is executing a tracert to a remote device. At what point would a router, which is in the path to the destination device, stop forwarding the packet?
when the value in the TTL field reaches zero
120. Which two traffic types use the Real-Time Transport Protocol (RTP)? (Choose two.)
video
voice
121. Which wireless technology has low-power and data rate requirements making it popular in home automation applications?
ZigBee
122. Which layer of the TCP/IP model provides a route to forward messages through an internetwork?
internet
123. Which type of server relies on record types such as A, NS, AAAA, and MX in order to provide services?
DNS
124. What are proprietary protocols?
protocols developed by organizations who have control over their definition and operation
125. What service is provided by DNS?
Resolves domain names, such as cisco.com, into IP addresses.
126. A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?
POP3
127. What command can be used on a Windows PC to see the IP configuration of that computer?
ipconfig
128. A wired laser printer is attached to a home computer. That printer has been shared so that other computers on the home network can also use the printer. What networking model is in use?
peer-to-peer (P2P)
129. What characteristic describes a virus?
malicious software or code running on an end device
130. Three bank employees are using the corporate network. The first employee uses a web browser to view a company web page in order to read some announcements. The second employee accesses the corporate database to perform some financial transactions. The third employee participates in an important live audio conference with other corporate managers in branch offices. If QoS is implemented on this network, what will be the priorities from highest to lowest of the different data types?
audio conference, financial transactions, web page
135. What service is provided by Internet Messenger?
An application that allows real-time chatting among remote users.
138. A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)
RFI​
EMI
139. A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in the ARP cache. How will the device obtain a destination MAC address?
It will send an ARP request for the MAC address of the default gateway.
140. Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)
integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper
implements CSMA/CD over legacy shared half-duplex media
141. A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?
DNS
142. A network administrator is adding a new LAN to a branch office. The new LAN must support 25 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.224
143. What characteristic describes a Trojan horse?
malicious software or code running on an end device
144. What service is provided by HTTPS?
Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.
145. A technician with a PC is using multiple applications while connected to the Internet. How is the PC able to keep track of the data flow between multiple application sessions and have each application receive the correct packet flows?
The data flow is being tracked based on the source port number that is used by each application.*
146. A network administrator is adding a new LAN to a branch office. The new LAN must support 61 connected devices. What is the smallest network mask that the network administrator can use for the new network?
255.255.255.192
148. What characteristic describes a DoS attack?
an attack that slows or crashes a device or network service
150. What service is provided by SMTP?
Allows clients to send email to a mail server and the servers to send email to other servers.
155. A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?
SSH
156. What characteristic describes an IPS?
software that identifies fast-spreading threats
157. What service is provided by DHCP?
Dynamically assigns IP addresses to end and intermediary devices.
161. The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?
The switch can be remotely managed from a host on another network.
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