final exam itcc
Match each description with an appropriate IP address. (Not all options are used.)
169.254.1.5- a link-local address 192.0.2.123- a test-net address 240.2.6.255- a experimental address 172.19.20.5- a private address 127.0.0.1- a loopback address
Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
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
Refer to the exhibit. A network engineer has been given the network address of 192.168.99.0 and a subnet mask of 255.255.255.192 to subnet across the four networks shown. How many total host addresses are unused across all four subnets?
200
What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64? 2001:DA48::/64 2001::/64 2001:DA48:FC5:A4::/64 2001:DA48:FC5::A4:/64
2001:DA48:FC5:A4::/64
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
Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?
255.255.255.128
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
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
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
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.
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. Which protocol was responsible for building the table that is shown?
ARP
What are three characteristics of the CSMA/CD process? (Choose three.)
After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired. + All of the devices on a segment see data that passes on the network medium. + A device listens and waits until the media is not busy before transmitting.
What service is provided by Internet Messenger?
An application that allows real-time chatting among remote users.
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.
What happens when the transport input ssh command is entered on the switch vty lines? The switch requires a username/password combination for remote access. The SSH client on the switch is enabled. Communication between the switch and remote users is encrypted. The switch requires remote connections via a proprietary client software.
Communication between the switch and remote users is encrypted.
A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?
DHCP
A client packet is received by a server. The packet has a destination port number of 53. What service is the client requesting?
DNS
Which type of server relies on record types such as A, NS, AAAA, and MX in order to provide services?
DNS
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 .
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? Enter CTRL-Z at the privileged mode prompt. Power cycle the device. Exit privileged EXEC mode and press Enter. Exit global configuration mode. Reboot the device.
Exit privileged EXEC mode and press Enter.
Which range of link-local addresses can be assigned to an IPv6-enabled interface? FE80::/10 FDEE::/7 FF00::/8 FEC0::/10
FE80::/10
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.
global routing prefix + subnet id + interface id
GRP- this network portion of the address is assigned by the provider SID- this part of the address is used by an organization to identify subnets IID- this part of the address is the equivalent to the host portion of an IPV4 address
A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?
IMAP
Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?
IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33
What are two features of ARP? (Choose two.)
If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.+ 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.
What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network? It checks the value of the TTL field and if it is 100, it discards the packet and sends a Destination Unreachable message to the source host. It increments the value of the TTL field by 1 and if the result is 100, it discards the packet and sends a Parameter Problem message to the source host. It checks the value of the TTL field and if it is 0, it discards the packet and sends a Destination Unreachable message to the source host. 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.
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.
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 Router Solicitation message to determine what default gateway it should use. It must send a DHCPv6 INFORMATION-REQUEST message to request the address of the DNS server. It must send a DHCPv6 REQUEST message to the DHCPv6 server to request permission to use this address. It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.
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.
Refer to the exhibit. Host B on subnet Teachers transmits a packet to host D on subnet Students. Which Layer 2 and Layer 3 addresses are contained in the PDUs that are transmitted from host B to the router?
Layer 2 destination address = 00-00-0c-94-36-abLayer 2 source address = 00-00-0c-94-36-bbLayer 3 destination address = 172.16.20.200Layer 3 source address = 172.16.10.200
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.
Which two statements accurately describe an advantage or a disadvantage when deploying NAT for ipv4 in a network
NAT provides a solution to slow down the IPv4 address depletion. + NAT introduces problems for some applications that require end-to-end connectivity.
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.
which two protocols operate at the top layer of the tcp/ip protocol suite
POP + DNS
peer-to-peer network + peer-to-peer application
PPN- no dedicated server is required + client and server roles are set on a per request basis PPA- requires a specific user interface + a background service is require.
physical topology diagram + logical topology diagram
PTD- location of a desktop PC in a classroom + path of cable that connect rooms to wiring closets LTD- ip address of a server
A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?
TFTP
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.
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.
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.)
The source port field identifies the running application or service that will handle data returning to the PC. + UDP segments are encapsulated within IP packets for transport across the network.+ The UDP destination port number identifies the application or service on the server which will handle the data.
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.
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
Which wireless technology has low-power and data rate requirements making it popular in home automation applications?
ZigBee
What are two primary responsibilities of the Ethernet MAC sublayer? (Choose two.)
accessing the media + data encapsulation
Match each description with the corresponding TCP mechanism. (Not all options are used.)
acknowledgment- received by a sender before transmitting more segments in a session retransmission- method of managing segments of data loss sequence numbers- used to identify missing segments of date window size- numbers of bytes a destination device can accept and process at one time
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.) —> Case B adds Ethernet control information to network protocol data integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper handles communication between upper layer networking software and Ethernet NIC hardware implements CSMA/CD over legacy shared half-duplex media enables IPv4 and IPv6 to utilize the same physical medium
adds ethernet control information to network protocol data + implements CSMA/CD over legacy shared half-duplex media
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
Which three layers of the OSI model map to the application layer of the TCP/IP model? (Choose three.)
application + session + presentation
Refer to the exhibit. If Host1 were to transfer a file to the server, what layers of the TCP/IP model would be used?
application, transport, Internet, and network access layers
What characteristic describes antispyware?
applications that protect end devices from becoming infected with malicious software
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 transaction, web page
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
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
Match the characteristic to the forwarding method. (Not all options are used.)
cut-through: has low latency + may forward runt frames + begins forwarding when the destination address is received store-and-forward: always stores the entire frame + checks the CRC before forwarding + checks the frame length before forwarding
what are two characteristics of IP
does not require a dedicated end-to-end connection + operated independently of the network media
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.)
emi + rfi
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
Match the application protocols to the correct transport protocols.
ftp +http+smtp+dhcp+ tftp
Match the type of threat with the cause. (Not all options are used.)
hardware threats: physical damage environmental threats: temperature extremes electrical threats: voltage spikes maintenance threats: poor handling of key electrical components
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.) —> Case C implements trailer with frame check sequence for error detection handles communication between upper layer networking software and Ethernet NIC hardware 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 implements a process to delimit fields within an Ethernet 2 frame
implements trailer with frame check sequence for error detection + adds ethernet control information to network protocol date
What two pieces of information are displayed in the output of the show ip interface brief command? (Choose two.)
ip addresses + layer 1 statuses
What is an advantage to using a protocol that is defined by an open standard?
it encourages competition and promotes choices
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
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?
it will send an ARP request for the MAC address of the default gateway.
what does the term "attenuation" mean in date communication
loss of signal strength as distance increases
What are two common causes of signal degradation when using UTP cabling? (Choose two.)
low-quality cable or connectors + improper termination
what characteristic describes a trojan horse ?
malicious software or code running on an end device
What three requirements are defined by the protocols used in network communcations to allow message transmission across a network? (Choose three.)
messages encoding + delivery options + message size
Refer to the exhibit. The switches are in their default configuration. Host A needs to communicate with host D, but host A does not have the MAC address for its default gateway. Which network hosts will receive the ARP request sent by host A?
only host b,c,and router r1
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)
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
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.) —> Case A handles communication between upper layer networking software and Ethernet NIC hardware 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 adds Ethernet control information to network protocol data applies delimiting of Ethernet frame fields to synchronize communication between nodes
places information in the ethernet frame that identidies which network layer protocol is being encapsulated by the frame + adds Ethernet control information to network protocol date
What are two characteristics shared by TCP and UDP? (Choose two.)
port numbering + use of checksum
What are proprietary protocols?
protocols developed by organizations who have control over their definition and operation
what is a function of the data link layer
provides for the exchange of frames over a common local 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.)
quality of service + fault tolerance + security
Refer to the exhibit. The IP address of which device interface should be used as the default gateway setting of host H1?
r1:g0/0
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
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.)
security, interference, coverage area
what characteristic describes adware
software that is installed on a user device and collects information about the user
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
Which switching method drops frames that fail the FCS check?
store-and-forwarding switching
What are the three parts of an IPv6 global unicast address? (Choose three.)
subnet id, global routing prefix, interface id
Which information does the show startup-config command display?
the contents of the saved configuration file in the NVRAM
what will happen if the default gateway address is incorrectly configured on a host
the host cannot communicate with hosts in other networks
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
which two statements are correct in a comparison of ipv4 and ipv6 packet headers
the source address field name from 1pv4 is kept in ipv6 + the time-to-live field from 1pv4 has been replaced by the hop limit field in ipv6
Refer to the exhibit. What is wrong with the displayed termination?
the untwisted length of each wire is too long
Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)
there are 4 hops between this device and the device at 192.168.100.1 + there is connectivity between this device and the device at 192.168.100.1
Match each type of frame field to its function. (Not all options are used.)
this field checks if the frame has been damaged during the transfer- error detection this field helps to direct the frame toward its destination- addressing this field identifies the beginning of a frame - frame start this field is used by the LLC to identify the layer 3 protocol- type
Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
time-to-live
why would a layer 2 switch need an ip address
to enable the switch to be managed remotely
What is the purpose of the TCP sliding window?
to request that a source decrease the rate at which it transmits data
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
Which type of security threat would be responsible if a spreadsheet add-on disables the local software firewall?
trojan horse
what technique is used with UTP cable to help protect against signal interference from crosstalk?
twisting the wire together into pairs
Which two traffic types use the Real-Time Transport Protocol (RTP)? (Choose two.)
video +voice
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
