WorksheetsОКС тест-3
Total questions: 48
Worksheet time: 29mins
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 addresses
PCs – 20 addresses needed
Printers – 2 addresses needed
Scanners – 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
255.255.255.0
255.255.255.248
255.255.255.240
255.255.255.252
What characteristic describes identity theft?
the use of stolen credentials to access private data
software on a router that filters traffic based on IP addresses or applications
software that identifies fast-spreading threats
a tunneling protocol that provides remote users with secure access into the network of an
organization
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?
255.255.255.240
255.255.255.0
255.255.255.248
255.255.255.224
What are three commonly followed standards for constructing and installing cabling?
(Choose three.)
pinouts
connector types
cable lengths
connector color
cost per meter (foot)
A client packet is received by a server. The packet has a destination port number of 143.
What service is the client requesting?
IMAP
FTP
SSH
Telnet
What are two characteristics shared by TCP and UDP? (Choose two.)
port numbering
use of checksum
ability to to carry digitized voice
connectionless communication
default window size
A client packet is received by a server. The packet has a destination port number of 21.
What service is the client requesting?
FTP
LDAP
SLP
SNMP
What attribute of a NIC would place it at the data link layer of the OSI model?
MAC address
attached Ethernet cable
TCP/IP protocol stack
RJ-45 port
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
255.255.255.224
255.255.255.248
255.255.255.192
What technique is used with UTP cable to help protect against signal interference from
crosstalk?
wrapping a foil shield around the wire pairs
twisting the wires together into pairs
terminating the cable with special grounded connectors
encasing the cables within a flexible plastic sheath
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
IP address: 192.168.10.41 subnet mask: 255.255.255.248, default gateway: 192.168.10.46
IP address: 192.168.10.254 subnet mask: 255.255.255.0, default gateway: 192.168.10.1
IP address: 192.168.10.38 subnet mask: 255.255.255.240, default gateway: 192.168.10.33
IP address: 192.168.10.65 subnet mask: 255.255.255.240, default gateway: 192.168.10.76
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 hosts B, C, and router R1
only hosts B and C
only hosts A, B, C, and D
only hosts A, B, and C
only router R1
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
88
72
224
158
Which connector is used with twisted-pair cabling in an Ethernet LAN?
LC conector
SC conector
BNC
RJ 11
RJ 45
A client packet is received by a server. The packet has a destination port number of 22.
What service is the client requesting?
SSH
SMB/CIFS
HTTPS
SLP
What characteristic describes an IPS?
a tunneling protocol that provides remote users with secure access into the network of an
organization
a network device that filters access and traffic coming into a network
software that identifies fast-spreading threats
software on a router that filters traffic based on IP addresses or applications
What service is provided by DHCP?
Dynamically assigns IP addresses to end and intermediary devices.
Uses encryption to provide secure remote access to network devices and servers.
Allows remote access to network devices and servers.
An application that allows real-time chatting among remote users.
Refer to the exhibit. The switches have a default configuration. Host A needs to
communicate with host D, but host A does not have the MAC address for the default gateway.
Which network devices will receive the ARP request sent by host A?
only hosts B, C, and router R1
only hosts A, B, C, and D
only hosts B and C
only host D
Which wireless technology has low-power and low-data rate requirements making it
popular in IoT environments?
Bluetooth
Zigbee
WiMAX
Wi-Fi
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 solicitations
neighbor advertisements
echo requests
echo replies
router solicitations
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 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 Router Solicitation message to determine what default gateway it
should use.
It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not
already in use on the network.
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.
The default gateway device is configured with the wrong IP address.
The default gateway is not operational.
The TCP/IP stack on the default gateway is not working properly.
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
512
1024
4096
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
255.255.255.224
255.255.255.128
255.255.255.240
What is a benefit of using cloud computing in networking?
Technology is integrated into every-day appliances allowing them to interconnect with other
devices, making them more ‘smart’ or automated.
Network capabilities are extended without requiring investment in new infrastructure,
personnel, or software.
End users have the freedom to use personal tools to access information and communicate
across a business network.
Home networking uses existing electrical wiring to connect devices to the network wherever
there is an electrical outlet, saving the cost of installing data cables.
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.
A packet that has crossed four routers has changed the destination IP address four times.
Every time a frame is encapsulated with a new destination MAC address, a new destination
IP address is needed.
Destination MAC addresses will never change in a frame that goes across seven routers.
What is one main characteristic of the data link layer?
It generates the electrical or optical signals that represent the 1 and 0 on the media.
It converts a stream of data bits into a predefined code.
It accepts Layer 3 packets and decides the path by which to forward the packet to a remote
network.
It shields the upper layer protocol from being aware of the physical medium to be used
in the communication.
What are three characteristics of the CSMA/CD process? (Choose three.)
A device listens and waits until the media is not busy before transmitting.
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 jam signal indicates that the collision has cleared and the media is not busy.
Devices can be configured with a higher transmission priority.
Which information does the show startup-config command display?
the contents of the saved configuration file in the NVRAM
the contents of the current running configuration file in the RAM
the bootstrap program in the ROM
the IOS image copied into RAM
Which two commands can be used on a Windows host to display the routing table?
(Choose two.)
route print
netstat -r
show ip route
netstat -s
tracert
What are two functions that are provided by the network layer? (Choose two.)
directing data packets to destination hosts on other networks
placing data on the network medium
carrying data between processes that are running on source and destination hosts
providing dedicated end-to-end connections
providing end devices with a unique network identifier
Which two statements describe features of an IPv4 routing table on a router? (Choose
two.)
It stores information about routes derived from the active router interfaces.
If a default static route is configured in the router, an entry will be included in the
routing table with source code S .
The routing table lists the MAC addresses of each active interface.
The netstat -r command can be used to display the routing table of a router.
Directly connected interfaces will have two route source codes in the routing table: C and S .
Which two statements describe features of an IPv4 routing table on a router? (Choose
two.)
The routing table stores information about routes derived from the active router
interfaces.
If a default static route is configured in the router, an entry will be included in the
routing table with source code S
The routing table lists the MAC addresses of each active interface.
Directly connected interfaces will have two route source codes in the routing table: C and S .
The netstat -r command can be used to display the routing table of a router.
What characteristic describes a VPN?
a tunneling protocol that provides remote users with secure access into the network of
an organization
a network device that filters access and traffic coming into a network
software that identifies fast-spreading threats
software on a router that filters traffic based on IP addresses or applications
Why would a Layer 2 switch need an IP address?
to enable the switch to be managed remotely
to enable the switch to receive frames from attached PCs
to enable the switch to function as a default gateway
to enable the switch to send broadcast frames to attached PCs
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
the MAC address of the destination host
the network domain of the destination host
the IP address of the default gateway
What is an advantage to using a protocol that is defined by an open standard?
A company can monopolize the market.
The protocol can only be run on equipment from a specific vendor.
An open standard protocol is not controlled or regulated by standards organizations.
It encourages competition and promotes choices.
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 TCP process running on the PC randomly selects the destination port when establishing
a session with the server.
TCP is the preferred protocol when a function requires lower network overhead.
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
255.255.255.192
255.255.255.0
255.255.255.240
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?
255.255.255.0
255.255.255.240
255.255.255.248
255.255.255.252
Match each item to the type of topology diagram on which it is typically identified. (Not
all options are used.)
location of a desktop PC in a classroom
physical topology diagram
path of cables that connect rooms to wiring closets
physical topology diagram
IP address of a server
logical topology diagram
What two pieces of information are displayed in the output of the show ip interface brief
command? (Choose two.)
IP addresses
Layer 1 statuses
interface descriptions
MAC addresses
next-hop addresses
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?
ping
nslookup
ipconfig /displaydns
tracert
Which value, that is contained in an IPv4 header field, is decremented by each router that
receives a packet?
Header Length
Differentiated Services
Fragment Offset
Time-to-Live
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.
Fiber optic cabling requires specific grounding to be immune to EMI.
Fiber optic cabling is susceptible to loss of signal due to RFI.
Fiber optic cable is able to withstand rough handling.
СоMatch each description with an appropriate IP address. (Not all options are used.)
an experimental address
240.2.6.255
a link-local address
169.254.1.5
a public address
198.133.219.2
a loopback address
127.0.0.1
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
when the router receives an ICMP Time Exceeded message
when the host responds with an ICMP Echo Reply message
when the values of both the Echo Request and Echo Reply messages reach zero
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?
virus
worm
phishing
spam
