Final Exam for IT 140 (B)
In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?
/25*
Which two notations are useable nibble boundaries when subnetting in IPv6? (Choose two.)
/64* /68*
Which three IP addresses are private ? (Choose three.)
10.172.168.1* 172.20.4.4* 192.168.5.254*
Refer to the exhibit. What is the maximum TTL value that is used to reach the destination www.cisco.com??
13*
How many bits make up the single IPv6 hextet :10CD:?
16*
A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
192.168.1.64/27* 192.168.1.96/28*
Refer to the exhibit. The network administrator enters these commands into the R1 router:R1# copy running-config tftpAddress or name of remote host [ ]?When the router prompts for an address or remote host name, what IP address should the administrator enter at the prompt?
192.168.11.252*
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
2001:DB8:0:AB00::1234*
What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?
2001:DB8:BC15:A::0*
Launch PT - Hide and Save PT Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Which IPv6 address is assigned to the Serial0/0/0 interface on RT2?
2001:db8:abc:5::1*
Which statement describes a characteristic of the Cisco router management ports?
A console port is not used for packet forwarding.*
Which statement is true about an interface that is configured with the IPv6 address command?
A link-local IPv6 address is automatically configured on the interface.*
How does a Layer 3 switch differ from a Layer 2 switch?
An IP address can be assigned to a physical port of a Layer 3 switch. However, this is not supported in Layer 2 switches.*
What must be configured to enable Cisco Express Forwarding (CEF) on most Cisco devices that perform Layer 3 switching?
CEF is enabled by default, so no configuration is necessary.*
Which keys act as a hot key combination that is used to interrupt an IOS process?
Ctrl-Shift-6*
A host PC has just booted and is attempting to lease an address through DHCP. Which two messages will the client typically broadcast on the network? (Choose two.)
DHCPDISCOVER* DHCPREQUEST*
Which statement is true regarding the UDP client process during a session with a server?
Datagrams that arrive in a different order than that in which they were sent are not placed in order.*
Which field in an IPv4 packet header will typically stay the same during its transmission?
Destination Address*
Which group of IPv6 addresses cannot be allocated as a host source address?
FF00::/8*
Which destination address is used in an ARP request frame?
FFFF.FFFF.FFFF*
What is the correct order for PDU encapsulation?
Frame Header, Network Header, Transport Header, Data, Frame Trailer
What field content is used by ICMPv6 to determine that a packet has expired?
Hop Limit field*
Which two components are configured via software in order for a PC to participate in a network environment? (Choose two.)
IP address* subnet mask*
A user gets an IP address of 192.168.0.1 from the company network administrator. A friend of the user at a different company gets the same IP address on another PC. How can two PCs use the same IP address and still reach the Internet, send and receive email, and search the web?
ISPs use Network Address Translation to change a user IP address into an address that can be used on the Internet.*
Which statement describes the sequence of processes executed by a router when it receives a packet from a host to be delivered to a host on another network?
It de-encapsulates the packet, selects the appropriate path, and encapsulates the packet to forward it toward the destination host*
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
It forwards the frame out of all ports except for the port at which the frame was received.*
Which characteristics describe fiber optic cable? (Choose two.)
It is not affected by EMI or RFI.* It is the most expensive type of LAN cabling*
What are two features of a physical, star network topology? (Choose two.)
It is straightforward to troubleshoot.* It is easy to add and remove end devices.*
Which statement describes a characteristic of the network layer in the OSI model?
Its protocols specify the packet structure and processing used to carry the data from one host to another.*
Which technology provides a solution to IPv4 address depletion by allowing multiple devices to share one public IP address?
NAT*
In which default order will a router search for startup configuration information?
NVRAM, TFTP, setup mode*
Launch PT - Hide and Save PT.
Open the PT activity. Perform the tasks in the activity instructions and then fill in the blank.The Server0 message isb "winner"
Fill in the blank.
Point-to-point communications where both devices can transmit and receive on the medium at the same time are known as full-duplex
Which two statements correctly describe a router memory type and its contents? (Choose two.)
ROM is nonvolatile and contains basic diagnostic software.* RAM is volatile and stores the IP routing table.*
Refer to the exhibit. Which IP addressing scheme should be changed?
Site 2*
Refer to the exhibit. An administrator wants to change the name of a brand new switch, using the hostname command as shown. What prompt will display after the command is issued??
Switch(config)#?*
Which three statements characterize the transport layer protocols? (Choose three.)
TCP and UDP port numbers are used by application layer protocols.* TCP uses windowing and sequencing to provide reliable transfer of data.* TCP is a connection-oriented protocol. UDP is a connectionless protocol.*
What information does the loopback test provide?
The TCP/IP stack on the device is working correctly.*
Refer to the exhibit. What is the significance of the asterisk (*) in the exhibited output?
The asterisk designates which file system is the default file system.*
What is a possible hazard that can be caused by network cables in a fire?
The cable insulation could be flammable.*
A network administrator is making changes to the configuration of a router. After making the changes and verifying the results, the administrator issues the copy running-config startup-config command. What will happen after this command executes?
The configuration will load when the router is restarted.*
Refer to the exhibit. A technician has configured a user workstation with the IP address and default subnet masks that are shown. Although the user can access all local LAN resources, the user cannot access any Internet sites by using either FQDN or IP addresses. Based upon the exhibit, what could account for this failure?
The default gateway address in incorrect.*
Refer to the exhibit. Router R1 has two interfaces that were configured with correct IP addresses and subnet masks. Why does the show ip route command output not display any information about the directly connected networks??
The no shutdown command was not issued on these interfaces.*
Consider the following range of addresses:
The prefix-length for the range of addresses is /60*
What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field?
The switch drops the frame.*
What happens when part of an Internet VoIP transmission is not delivered to the destination?
The transmission continues without the missing portion.*
What happens when part of an Internet radio transmission is not delivered to the destination?
The transmission continues without the missing portion.*
What happens when part of an Internet television transmission is not delivered to the destination?
The transmission continues without the missing portion.*
Fill in the blank.
To prevent faulty network devices from carrying dangerous voltage levels, equipment must be grounded *correctly
Which WLAN security protocol generates a new dynamic key each time a client establishes a connection with the AP?
WPA*
What device is commonly used to verify a UTP cable?
a cable tester*
What does a router use to determine where to send data it receives from the network?
a routing table*
What are the two main components of Cisco Express Forwarding (CEF)? (Choose two.)
adjacency tables* forwarding information base (FIB)*
Why does HTTP use TCP as the transport layer protocol?
because HTTP requires reliable delivery*
What two preconfigured settings that affect security are found on most new wireless routers? (Choose two.)
broadcast SSID* default administrator password*
Which function is provided by TCP?
detection of missing packets*
Refer to the exhibit. A ping to PC2 is issued from PC0, PC1, and PC3 in this exact order. Which MAC addresses will be contained in the S1 MAC address table that is associated with the Fa0/1 port?
just PC0 and PC1 MAC addresses*
Refer to the exhibit. A ping to PC3 is issued from PC0, PC1, and PC2 in this exact order. Which MAC addresses will be contained in the S1 MAC address table that is associated with the Fa0/1 port?
just PC0 and PC1 MAC addresses*
Which two statements describe the functions or characteristics of ROM in a router? (Choose two.)
maintains instructions for POST diagnostics* stores bootstrap program*
Which of the following are primary functions of a router? (Choose two.)
packet switching* path selection*
A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?
predictable static IP addresses for easier identification*
What types of addresses make up the majority of addresses within the /8 block IPv4 bit space?
public addresses*
A host is accessing a Telnet server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
regenerating data signals* applying security settings to control the flow of data* notifying other devices when errors occur*
A host is accessing an FTP server on a remote network. Which three functions are performed by intermediary network devices during this conversation? (Choose three.)
regenerating data signals* applying security settings to control the flow of data* notifying other devices when errors occur*
Which device should be used for enabling a host to communicate with another host on a different network?
router*
Which firewall technique blocks incoming packets unless they are responses to internal requests?
stateful packet inspection*
A technician uses the ping 127.0.0.1 command. What is the technician testing?
the TCP/IP stack on a network host*
A network technician is measuring the transfer of bits across the company backbone for a mission critical application. The technician notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
the amount of traffic that is currently crossing the network* the type of traffic that is crossing the network* the latency that is created by the number of network devices that the data is crossing*
What is the auto-MDIX feature on a switch?
the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection*
Which parameter does the router use to choose the path to the destination when there are multiple routes available?
the lower metric value that is associated with the destination network*
A frame is transmitted from one networking device to another. Why does the receiving device check the FCS field in the frame?
to check the frame for possible transmission errors*
What is the effect of configuring the ipv6 unicast-routing command on a router?
to enable the router as an IPv6 router*
Why would a network administrator use the tracert utility?
to identify where a packet was lost or delayed on a network*
What is the purpose of the network security accounting function?
to keep track of the actions of a user*
What is the purpose of adjacency tables as used in Cisco Express Forwarding (CEF)?
to maintain Layer 2 next-hop addresses*
What is the purpose of the network security authentication function?
to require users to prove who they are*
What is the purpose of the routing process?
to select the paths that are used to direct traffic to destination networks*
When is a dial-up connection used to connect to an ISP?
when a regular telephone line is used*
What needs to be checked when testing a UTP network cable?
wire map*
Which two components are necessary for a wireless client to be installed on a WLAN? (Choose two.)
wireless NIC* wireless client software*
What is an example of a top-level domain?
.com*
A network administrator is variably subnetting a given block of IPv4 addresses. Which combination of network addresses and prefix lengths will make the most efficient use of addresses when the need is for 2 subnets capable of supporting 10 hosts and 1 subnet that can support 6 hosts?
10.1.1.128/28 10.1.1.144/28 10.1.1.160/29*
Refer to the exhibit. What is the maximum TIL value that is used to reach the destination www.cisco.com?
13*
Refer to the exhibit. An administrator must send a message to everyone on the router A network. What is the broadcast address for network 172.16.16.0/22?
172.16.19.255*
What is the prefix for the host address 2001:DB8:BC15:A:12AB::1/64?
2001:DB8:BC15:A*
What is the metric value that is used to reach the 10.1.1.0 network in the following routing table entry? D 10.1.1.0/24 [90/2170112] via 209.165.200.226, 00:00:05, Serial0/0/0
2170112*
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
236.17.12.10*
How many additional bits should be borrowed from a /26 subnet mask in order to create subnets for WAN links that need only 2 useable addresses?
4*
How many bits would need to be borrowed if a network admin were given the IP addressing scheme of 172.16.0.0/16 and needed no more than 16 subnet with equal number of hosts?
4*
How many IPv4 addresses are available to be assigned to hosts on a network that has a mask of 255.255.255.248?
6*
A network administrator is enabling services on a newly installed server. Which two statements describe how services are used on a server? (Choose two
A port is considered to be open when it has an active server application that is assigned to it.* Server security can be improved by closing ports that are associated with unused services.*
Which statement best describes the operation of the File Transfer Protocol?
An FTP server uses a source port number of 20 and a randomly generated destination port number during the establishment of control traffic with an FTP client.*
Refer to the exhibit. The administrator configured the access to the console and the vty lines of a router. Which conclusion can be drawn from this configuration?
Because the IOS includes the login command on the vty lines by default, access to the device via Telnet will require authentication.*
To what legacy address class does the address 10.0.0.0 belong?
Class A*
A host PC is attempting to lease an address through DHCP. What message is sent by the server to the client know it is able to use the provided IP information?
DHCPOFFER*
Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?
DNS *
What is a characteristic of DNS?
DNS servers can cache recent queries to reduce DNS query traffic.*
Fill in the blank. Use a number.
IPv4 multicast addresses are directly mapped to IEEE 802 (Ethernet) MAC addresses using the last ___4___ of the 28 available bits in the IPv4 multicast group address.
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.*
How could a faulty network device create a source of hazard for a user? (Choose two.)
It could stop functioning.* It could explode.*
Which statement describes data throughput?
It is the measure of the bits transferred across the media over a given period of time.*
What does a client do when it has UDP datagrams to send?
It just sends the datagrams.*
What action does a DHCPv4 client take if it receives more than one DHCPOFFER from multiple DHCP servers?
It sends a DHCPREQUEST that identifies which lease offer the client is accepting.*
An administrator issued the service password-encryption command to apply encryption to the passwords configured for enable password, vty, and console lines. What will be the consequences if the administrator later issues the no service password-encryption command?
It will not reverse any encryption.*
What information is maintained in the CEF adjacency table?
MAC address to IPv4 address mappings*
Fill in the blank.
Network devices come in two physical configurations. Devices that have expansion slots that provide the flexibility to add new modules have a Modular * configuration.
Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
POP DNS
During normal operation, from which location do most Cisco routers run the IOS?
RAM*
During normal operation, from which location do most Cisco switches and routers run the IOS?
RAM*
Which protocol supports rapid delivery of streaming media?
Real-Time Transport Protocol*
Which method of IPv6 prefix assignment relies on the prefix contained in RA messages?
SLAAC*
Which protocol requires the establishment of a session between sender and receiver hosts prior to transmitting data?
TCP*
Question:It will give 4 options about ping, the correct one is:
The PC2 will be able to ping 192.168.1.1*
A client is establishing a TCP session with a server. How is the acknowledgment number in the response segment to the client determined?
The acknowledgment number field is modified by adding 1 to the randomly chosen initial sequence number in response to the client.*
After making configuration changes, a network administrator issues a copy running-config startup-config command in a Cisco switch. What is the result of issuing this command?
The new configuration will be loaded if the switch is restarted.*
What is a characteristic of multicast messages?
They are sent to a select group of hosts.*
Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
VoIP* DNS*
Which type of wireless security is easily compromised?
WEP*
Which statement is true about DHCP operation?
When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.*
What type of communication rule would best describe CSMA/CD?
access method*
A particular telnet site does not appear to be responding on a Windows 7 computer. What command could the technician use to show any cached DNS entries for this web page?
ipconfig /displaydns*
A network administrator is configuring access control to switch SW1. If the administrator uses console line to connect to the switch, which password is needed to access user EXEC mode?
lineconin*
There was also a question about if you activated service password encryption in the past and you prompt "no service password encryption" what password are modified ?
no password at all;*
In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?
peer-to-peer *
What are three important considerations when planning the structure of an IP addressing scheme? (Choose three.)
preventing duplication of addresses* providing and controlling access* conserving addresses*
What type of communication medium is used with a wireless LAN connection?
radio waves*
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
terminal monitor*
A network administrator notices that the throughput on the network appears lower than expected when compared to the end-to-end network bandwidth. Which three factors can explain this difference? (Choose three.)
the amount of traffic* the type of traffic* the number and type of network devices that the data is crossing*
What is the primary reason to subnet IPv6 prefixes?
to create a hierarchical Layer 3 network design*
Why does layer 3 device perform the ANDing process on a destination IP and subnet Mask?
to identify network address of destination host;*
What is the purpose of ICMP messages?
to provide feedback of IP packet transmissions*
Which type of wireless security generates dynamic encryption keys each time a client associates with an AP?
WPA*
Which type of wireless security makes use of dynamic encryption keys each time a client associates with an AP?
WPA*
A network technician is investigating network connectivity from a PC to a remote host with the address 10.1.1.5. Which command issued on the PC will return to the technician the complete path to the remote host?
tracert 10.1.1.5*
Refer to the exhibit. A TCP segment from a server has been captured by Wireshark, which is running on a host. What acknowledgement number will the host return for the TCP segment that has been received?
306*
Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks? (Choose two.)
It eliminates most address configuration errors.* It reduces the burden on network support staff.*
Refer to the exhibit. Consider the IP address configuration shown from PC1. What is a description of the default gateway address?
It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.*
Fill in the blank.
TFTP* is a best-effort, connectionless application layer protocol that is used to transfer files.
Which router interface should be used for direct remote access to the router via a modem?
an AUX port*
A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?
any line configuration mode*
Refer to the exhibit. Which area would most likely be an extranet for the company network that is shown?
area C*
On a school network, students are surfing the web, searching the library database, and attending an audio conference with their sister school in Japan. If network traffic is prioritized with QoS, how will the traffic be classified from highest priority to lowest priority?
audio conference, database, HTTP*
Three office workers 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 office workers 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*
