WorksheetsОКС тест-2
Total questions: 50
Worksheet time: 29mins
What is an advantage for small organizations of adopting IMAP instead of POP?
POP only allows the client to store messages in a centralized way, while IMAP allows
distributed storage
Messages are kept in the mail servers until they are manually deleted from the email
client.
When the user connects to a POP server, copies of the messages are kept in the mail server
for a short time, but IMAP keeps them for a long time.
IMAP sends and retrieves email, but POP only retrieves email
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?
tracert
ipconfig
netstat
nslookup
Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to
facilitate Ethernet communication? (Choose two.)
implements CSMA/CD over legacy shared half-duplex media
enables IPv4 and IPv6 to utilize the same physical medium
integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over
copper
implements a process to delimit fields within an Ethernet 2 frame
places information in the Ethernet frame that identifies which network layer protocol is
being encapsulated by the frame
Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to
facilitate Ethernet communication? (Choose two.)
responsible for internal structure of Ethernet 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
implements trailer with frame check sequence for error detection
Which two functions are performed at the LLC 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
places information in the Ethernet frame that identifies which network layer protocol is
being encapsulated by the frame
implements CSMA/CD over legacy shared half-duplex media
adds Ethernet control information to network protocol data
applies source and destination MAC addresses to Ethernet frame
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
adds Ethernet control information to network protocol data
applies source and destination MAC addresses to Ethernet frame
responsible for the internal structure of Ethernet frame
implements trailer with frame check sequence for error detection
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
handles communication between upper layer networking software and Ethernet NIC
hardware
applies source and destination MAC addresses to Ethernet frame
integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over
copper
responsible for internal structure of Ethernet frame
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 communicate with other hosts on the 172.16.100.0 network.
The switch can be remotely managed from a host on another network.
The switch is limited to sending and receiving frames to and from the gateway 172.16.100.1.
The switch will have a management interface with the address 172.16.100.1.
What happens when the transport input ssh command is entered on the switch vty lines?
The SSH client on the switch is enabled.
The switch requires a username/password combination for remote access.
Communication between the switch and remote users is encrypted.
The switch requires remote connections via a proprietary client software
What service is provided by HTTP?
Uses encryption to secure the exchange of text, graphic images, sound, and video on the
web.
Allows for data transfers between a client and a file server.
An application that allows real-time chatting among remote users.
basic set of rules for exchanging text, graphic images, sound, video, and other
multimedia files on the web.
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?
DoS
access
reconnaissance
Trojan horse
A client packet is received by a server. The packet has a destination port number of 67.
What service is the client requesting?
FTP
DHCP
Telnet
SSH
What are two problems that can be caused by a large number of ARP request and reply
messages? (Choose two.)
Switches become overloaded because they concentrate all the traffic from the attached
subnets.
The ARP request is sent as a broadcast, and will flood the entire subnet.
The network may become overloaded because ARP reply messages have a very large
payload due to the 48-bit MAC address and 32-bit IP address that they contain.
A large number of ARP request and reply messages may slow down the switching process,
leading the switch to make many changes in its MAC table.
All ARP request messages must be processed by all nodes on the local network.
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
telnet
tracert
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?
analyze the destination IP address
switch the packet to the directly connected interface
look up the next-hop address for the packet
discard the traffic after consulting the route table
What characteristic describes antispyware?
applications that protect end devices from becoming infected with malicious software
a network device that filters access and traffic coming into a network
software on a router that filters traffic based on IP addresses or applications
a tunneling protocol that provides remote users with secure access into the network of an
organization
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?
Telnet
AUX
SSH
Console
What are the two most effective ways to defend against malware? (Choose two.)
Install and update antivirus software.
Update the operating system and other application software.
Implement strong passwords.
Implement RAID.
Implement network firewalls.
Which type of security threat would be responsible if a spreadsheet add-on disables the
local software firewall?
brute-force attack
Trojan horse
DoS
buffer overflow
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?
User Datagram Protocol field
transport layer error check field
flow control field
frame check sequence field
error correction process field
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
255.255.255.0
255.255.255.128
255.255.255.192
What service is provided by POP3?
Retrieves email from the server by downloading the email to the local mail application
of the client.
An application that allows real-time chatting among remote users.
Allows remote access to network devices and servers.
Uses encryption to provide secure remote access to network devices and servers.
What two security solutions are most likely to be used only in a corporate environment?
(Choose two.)
antispyware
virtual private networks
intrusion prevention systems
strong passwords
antivirus software
What characteristic describes antivirus software?
applications that protect end devices from becoming infected with malicious software
a network device that filters access and traffic coming into a network
a tunneling protocol that provides remote users with secure access into the network of an
organization
software on a router that filters traffic based on IP addresses or applications
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 0, it discards the packet and sends a
Destination Unreachable message to the source host.
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 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 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.
A client packet is received by a server. The packet has a destination port number of 69.
What service is the client requesting?
DNS
DHCP
SMTP
TFTP
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.
Enable inbound vty Telnet sessions.
Generate two-way pre-shared keys.
Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to
facilitate Ethernet communication? (Choose two.)
handles communication between upper layer networking software and Ethernet NIC
hardware
implements trailer with frame check sequence for error detection
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
adds Ethernet control information to network protocol data
An IPv6 enabled device sends a data packet with the destination address of FF02::2. What
is the target of this packet?
all IPv6 enabled devices on the local link
all IPv6 DHCP servers
all IPv6 enabled devices across the network
all IPv6 configured routers on the local link
What are the three parts of an IPv6 global unicast address? (Choose three.)
subnet ID
global routing prefix
interface ID
broadcast address
subnet mask
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
extensive cabling
mobility options
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 .
Enter CTRL-Z at the privileged mode prompt.
Power cycle the device.
Exit global configuration mode.
Reboot the device.
What method is used to manage contention-based access on a wireless network?
token passing
CSMA/CA
priority ordering
CSMA/CD
What is a function of the data link layer?
provides the formatting of data
provides end-to-end delivery of data between hosts
provides delivery of data between two applications
provides for the exchange of frames over a common local media
What is the purpose of the TCP sliding window?
to ensure that segments arrive in order at the destination
to end communication when data transmission is complete
to inform a source to retransmit data from a specific point forward
to request that a source decrease the rate at which it transmits data
What characteristic describes spyware?
a network device that filters access and traffic coming into a network
software that is installed on a user device and collects information about the user
an attack that slows or crashes a device or network service
the use of stolen credentials to access private data
Which switching method drops frames that fail the FCS check?
store-and-forward switching
borderless switching
ingress port buffering
cut-through switching
Which range of link-local addresses can be assigned to an IPv6-enabled interface?
FEC0::/10
FDEE::/7
FE80::/10
FF00::/8
What service is provided by FTP?
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia
files on the web.
An application that allows real-time chatting among remote users.
Allows for data transfers between a client and a file server.
Uses encryption to secure the exchange of text, graphic images, sound, and video on the
web.
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
source port number
HTTP server
source MAC address
default gateway
Which two statements accurately describe an advantage or a disadvantage when deploying
NAT for IPv4 in a network? (Choose two.)
NAT adds authentication capability to IPv4.
NAT introduces problems for some applications that require end-to-end connectivity.
NAT will impact negatively on switch performance.
NAT provides a solution to slow down the IPv4 address depletion.
NAT improves packet handling.
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?
0C6F:65FF:FEC2:BDF8
1E6F:65FF:FEC2:BDF8
C16F:65FF:FEC2:BDF8
106F:65FF:FEC2:BDF8
What service is provided by BOOTP?
Uses encryption to secure the exchange of text, graphic images, sound, and video on the
web.
Allows for data transfers between a client and a file server.
Legacy application that enables a diskless workstation to discover its own IP address
and find a BOOTP server on the network.
A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia
files on the web.
What characteristic describes adware?
a network device that filters access and traffic coming into a network
software that is installed on a user device and collects information about the user
the use of stolen credentials to access private data
an attack that slows or crashes a device or network service
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?
cut-through
store-and-forward
fast-forward
fragment-free
What are two primary responsibilities of the Ethernet MAC sublayer? (Choose two.)
error detection
frame delimiting
accessing the media
data encapsulation
logical addressing
What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?
2001:DA48::/64
2001:DA48:FC5::A4:/64
2001:DA48:FC5:A4::/64
2001::/64
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?
syslog records and messages
the network performance baselinethe network performance baseline
debug output and packet captures
network configuration files
How does the service password-encryption command enhance password security on Cisco
routers and switches?
It requires encrypted passwords to be used when connecting remotely to a router or switch
with Telnet.
It encrypts passwords that are stored in router or switch configuration files.
It requires that a user type encrypted passwords to gain console access to a router or switch.
It encrypts passwords as they are sent across the network.
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 Version field from IPv4 is not kept in IPv6.
The Destination Address field is new in IPv6.
The Header Checksum 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.
