Final Exam for IT 140 (A)
A DHCP server is used to IP addresses dynamically to the hosts on a network. The address pool is configured with 10.29.244.0/25. There are 19 printers on this network that need to use reserve static IP addresses from the pool. How many IP address in the pool are left to be assign to other hosts?
107*
Which IPv4 address can be pinged to test the internal TCP/IP operation of a host?
127.0.0.1*
What subnet mask is required to support 512 subnets on networks 172.28.0.0/16?
255.255.255.128*
How many usable IP addresses are available on the 192.168.1.0/27 network?
30*
How many hosts are addressable on a network that has a mask of 255.255.255.248?
6*
What is the protocol that is used to discover a physical address from a known logical address and what message type does it use?
ARP, broadcast*
Match the situation with the appropriate use of network media.
Copper Cables horizontal cabling structure desktop PCs in an enterprise office Fiber Optic backbone cabling in an enterprise long-haul networks Wireless guest access in a coffee shop waiting rooms in a hospital
What three application layer protocols are part of the TCP/IP protocol suite? (Choose three.)
DHCP* DNS* FTP*
What network service resolves the URL entered on a PC to the IP address of the destination server?
DNS*
Which two protocols operate at the highest layer of the TCP/IP protocol stack? (Choose two.)
DNS* POP*
Fill in the blank.
During data communications, a host may need to send a single message to a specific group of destination hosts simultaneously. This message is in the form of a Multicast message.
What is one difference between the client-server and peer-to-peer network models?
Every device in a peer-to-peer network can function as a client or a server.*
Which two statements describe the characteristics of fiber-optic cabling? (Choose two.)
Fiber-optic cabling does not conduct electricity.* Fiber-optic cabling is primarily used as backbone cabling.*
Which two protocols function at the internet layer? (Choose two)
ICMP* IP*
Fill in the blank.
ISOC, IANA, EIA, and IEEE represent standards organizations which help to promote and maintain an open Internet.
What is an important function of the physical layer of the OSI model?
It encodes frames into electrical, optical, or radio wave signals.*
What are three characteristics of an SVI? (Choose three.)
It is not associated with any physical interface on a switch.* It provides a means to remotely manage a switch. * It is associated with VLAN1 by default.*
What is the purpose of the command ping ::1?
It tests the internal configuration of an IPv6 host.*
What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame.*
What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?
MAC address*
Which address on a PC does not change, even if the PC is moved to a different network?
MAC address*
After several configuration changes are made to a router, the copy running-configuration startup-configuration command is issued. Where will the changes be stored?
NVRAM*
Refer to the exhibit. Which action will be successful?
PC2 can send a ping to 192.168.1.1.*
Fill in the blank.
Port numbers ranging from 0 to 1023 are considered to be Well Known ports.
Which publicly available resources describe protocols, processes, and technologies for the Internet but do not give implementation details?
Request for Comments*
Which service provides dynamic global IPv6 addressing to end devices without using a server that keeps a record of available IPv6 addresses?
SLAAC*
A technician configures a switch with these commands: SwitchA(config)# interface vlan 1 SwitchA(config-if)# ip address 192.168.1.1 255.255.255.0SwitchA(config-if)# no shutdownWhat is the technician configuring?
SVI*
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.*
What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?
The computer receives an IP address that starts with 169.254*
Refer to the exhibit. From global configuration mode, an administrator is attempting to create a message-of-the-day banner by using the command banner motd V Authorized access only! Violators will be prosecuted! V When users log in using Telnet, the banner does not appear correctly. What is the problem?
The delimiting character appears in the banner message.*
What will happen if the default gateway address is incorrectly configured on a host?
The host cannot communicate with hosts in other networks.*
What is a characteristic of multicast messages?
They are sent to a select group of hosts.*
A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?
an increase in host-to-host ping response times*
A large corporation has modified its network to allow users to access network resources from their personal laptops and smart phones. Which networking trend does this describe?
bring your own device*
Which two roles can a computer assume in a peer-to-peer network where a file is being shared between two computers? (Choose two.)
client* server*
Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?
client/server*
What is contained in the trailer of a data-link frame?
error detection*
Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?
extranet*
Refer to the exhibit. From which location did this router load the IOS?
flash memory*
Which communication tool allows real-time collaboration?
instant messaging*
A medium-sized business is researching available options for connecting to the Internet. The company is looking for a high speed option with dedicated, symmetric access. Which connection type should the company choose?
leased line*
At a minimum, which address is required on IPv6-enabled interfaces?
link-local*
What is a function of the data link layer?
provides for the exchange of data over a common local media*
A host is accessing a Web 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*
What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
scalability*
Which name is assigned to the transport layer PDU?
segment*
What is the process of dividing a data stream into smaller pieces before transmission?
segmentation*
Which firewall feature is used to ensure that packets coming into a network are legitimate responses to requests initiated from internal hosts?
stateful packet inspection*
When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?
subnet mask*
Which command can an administrator issue on a Cisco router to send debug messages to the vty lines?
terminal monitor*
In computer communication, what is the purpose of message encoding?
to convert information to the appropriate form for transmission*
What is the purpose of having a converged network?
to reduce the cost of deploying and maintaining the communication infrastructure*
What is the function of the HTTP GET message?
to request an HTML page from a web server*
True or False. A dedicated server is not needed when implementing a peer-to-peer network.
true*
A network administrator is upgrading a small business network to give high priority to real-time applications traffic. What two types of network services is the network administrator trying to accommodate? (Choose two.)
voice* video*
What method is used to manage contention-based access on a wireless network?
CSMA/CA*
A wireless host needs to request an IP address. What protocol would be used to process the request?
DHCP*
A user is unable to reach the web site when typing http://www.cisco.com in a web browser, but can reach the same site by typing http://72.163.4.161. What is the issue?
DNS *
A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?
DSL*
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FE80::/10*
Refer to the exhibit. Match the packets with their destination IP address to the exiting interfaces on the router. (Not all options are used.)
FastEthernet0/0 -> packets with destination of 172.17.6.15 FastEthernet0/1 -> packets with destination of 172.17.14.8 FastEthernet1/0 -> packets with destination of 172.17.12.10 FastEthernet1/1 -> packets with destination of 172.17.10.5 Serial0/0/0 -> packets with destination of 172.17.8.20
What is a benefit of using cloud computing in networking?
Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.*
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
Segments are sent from the transport layer to the internet layer.*
A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?
WAN*
What is a characteristic of a fault tolerant network?
a network that recovers quickly when a failure occurs and depends on redundancy to limit the impact of a failure.
What layer is responsible for routing messages through an internetwork in the TCP/IP model?
internet*
Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator uses a console connection to connect to the switch, which password is needed to access user EXEC mode?
lineconin.
What type of IPv6 address is FE80::1?
link-local*
When applied to a router, which command would help mitigate brute-force password attacks against the router?
login block-for 60 attempts 5 within 60*
Which example of malicious code would be classified as a Trojan horse?
malware that was written to look like a video game*
Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)
network* transport*
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*
When planning for network growth, where in the network should packet captures take place to assess network traffic?
on as many different network segments as possible*
Which two functions are primary functions of a router? (Choose two.)
packet forwarding* path selection*
A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?
partial mesh*
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
62*
Which domain name would be an example of a top-level domain?
.com*
What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)
10.0.0.0/8* 172.16.0.0/12* 192.168.0.0/16*
What is the binary representation of 0xCA?
11001010*
Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26*
Refer to the exhibit. Consider the IP address of 192.168.10.0/24 that has been assigned to a high school building. The largest network in this building has 100 devices. If 192.168.10.0 is the network number for the largest network, what would be the network number for the next largest network, which has 40 devices?
192.168.10.128*
Which three addresses are valid public addresses? (Choose three.)
198.133.219.17* 128.107.12.117* 64.104.78.227 *
What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?
2001:0:0:abcd::1*
What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?
203.0.113.211*
A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?
255.255.255.128*
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*
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 addressesSubnetwork B: PCs - 8 addressesSubnetwork C: Printers - 2 addressesWhat single subnet mask would be appropriate to use for the three subnetworks?
255.255.255.240*
Refer to the exhibit. An administrator is testing connectivity to a remote device with the IP address 10.1.1.1. What does the output of this command indicate?
A router along the path did not have a route to the destination.*
What are three characteristics of multicast transmission? (Choose three.)
A single packet can be sent to a group of hosts. * Multicast transmission can be used by routers to exchange routing information. * Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.*
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.*
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*
What are two benefits of using a layered network model? (Choose two.)
It assists in protocol design. It prevents technology in one layer from affecting other layers.
What function does pressing the Tab key have when entering a command in IOS?
It completes the remainder of a partially typed word in a command.*
What purpose does NAT64 serve in IPv6?
It converts IPv6 packets into IPv4 packets.*
What is an advantage to using a protocol that is defined by an open standard?
It encourages competition and promotes choices.*
What is the function of the shell in an OS?
It interfaces between the users and the kernel.*
What are two characteristics of fiber-optic cable? (Choose two.)
It is not affected by EMI or RFI.* It is more expensive than UTP cabling is.*
What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.*
What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
TCP
A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?
The address is returned to the pool for reuse when the lease expires.*
Refer to the exhibit. What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?
The administrator will be presented with the R1> prompt.*
A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?
The command is being entered from the wrong mode of operation.
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)
The frame has the broadcast address as the destination address. * The destination address is unknown to the switch.*
After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?
The new configuration will be loaded if the switch is restarted.*
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
The physical address is added.*
Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements.*
Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)
There is connectivity between this device and the device at 192.168.100.1.* There are 4 hops b**etween this device and the device at 192.168.100.1.*
What are two characteristics of Ethernet MAC addresses?
They are globally unique.* They are expressed as 12 hexadecimal digits.*
Which three statements characterize UDP? (Choose three.)
UDP provides basic connectionless transport layer functions.* UDP relies on application layer protocols for error detection. * UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.*
On which switch interface would an administrator configure an IP address so that the switch can be managed remotely?
VLAN 1.
Which connection provides a secure CLI session with encryption to a Cisco network device?
an SSH connection*
Which connection provides a secure CLI session with encryption to a Cisco switch?
an SSH connection*
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.
How does quality of service help a network support a wide range of applications and services?
by providing mechanisms to manage congested network traffic*
What is a characteristic of UTP cabling?
cancellation*
Which two tasks are functions of the presentation layer? (Choose two.)
compression* encryption*
Where are Cisco IOS debug output messages sent by default?
console line*
What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
data link layer addressing* detection of errors through CRC calculations * delimiting groups of bits into frames*
Refer to the exhibit. The network administrator for a small advertising company has chosen to use the 192.168.5.96/27 network for internal LAN addressing. As shown in the exhibit, a static IP address is assigned to the company web server. However, the web server cannot access the Internet. The administrator verifies that local workstations with IP addresses that are assigned by a DHCP server can access the Internet, and the web server is able to ping local workstations. Which component is incorrectly configured?
default gateway address*
What addresses are mapped by ARP?
destination MAC address to a destination IPv4 address*
What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
destination and source port numbers*
If a device receives an Ethernet frame of 60 bytes, what will it do?
drop the frame*
What are two examples of the cut-through switching method? (Choose two.)
fast-forward switching* fragment-free switching*
Which switching method has the lowest level of latency?
fast-forward*
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
physical layer*
Match each item to the type of topology diagram on which it is typically identified. (Not all options are used.)
physical topology diagram location of a desktop PC in a classroom path of cables that connect rooms to wiring closets logical topology diagram IP address of a server
What are two characteristics shared by TCP and UDP? (Choose two.)
port numbering* use of checksum*
What is a key characteristic of the peer-to-peer networking model?
resource sharing without a dedicated server*
Which two commands can be used on a Windows host to display the routing table? (Choose two.)
route print* netstat -r*
What are two services provided by the OSI network layer? (Choose two.)
routing packets toward the destination * encapsulating PDUs from the transport layer*
Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator has already logged into a Telnet session on the switch, which password is needed to access privileged EXEC mode?
secretin*
A network technician suspects that a particular network connection between two Cisco switches is having a duplex mismatch. Which command would the technician use to see the Layer 1 and Layer 2 details of a switch port?
show interfaces*
What is the TCP mechanism used in congestion avoidance?
sliding window*
What information is added during encapsulation at OSI Layer 3?
source and destination IP address*
Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
store-and-forward switching*
Which type of UTP cable is used to connect a PC to a switch port?
straight-through*
What source IP address does a router use by default when the traceroute command is issued?
the IP address of the outbound interface*
An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing the ping command. What is the purpose of using these keystrokes?
to interrupt the ping process.
A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator 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*
A network engineer is measuring the transfer of bits across the company backbone for a mission critical database application. The engineer 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*
A user opens three browsers on the same PC to access www.cisco.com to search for certification course information. The Cisco web server sends a datagram as a reply to the request from one of the web browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?
the destination port number*
Why are port numbers included in the TCP header of a segment?
to enable a receiving host to forward the data to the appropriate application*
What are two ways that TCP uses the sequence numbers in a segment? (Choose two.)
to identify missing segments at the destination * to reassemble the segments at the remote location*
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify the network address of the destination network*
What are two functions of NVRAM? (Choose two.)
to retain contents when power is removed * to store the startup configuration file*
Which procedure is used to reduce the effect of crosstalk in copper cables?
twisting opposing circuit wire pairs together*
Match the description with the associated IOS mode. (not all options are used.)
user EXEC mode limited number of basic monitoring commands the first entrance intro the CLI of an IOS device privileged EXEC mode accessed by entering the enable command identified by a prompt ending with the # character global configuration mode changes made affect the operation of the device as a whole accessed by entering the configure terminal command
What are two actions performed by a Cisco switch? (Choose two.)
using the source MAC addresses of frames to build and maintain a MAC address table* utilizing the MAC address table to forward frames via the destination MAC address*
In what two situations would UDP be the preferred transport protocol over TCP? (Choose two.)
when a faster delivery mechanism is needed* when applications do not need to guarantee delivery of the data*
