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Networking Essentials 1-23+27-28 Flashcards | StudBud
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Networking Essentials 1-23+27-28
Networking Essentials 1-23+27-28
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SkillsForAll Cisco Networking Essentials Modules 1-23+27-28
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Answers
1
Which two applications provide virtual terminal access to remote servers? (Choose two.)
SSH
Telnet
ICMP
SMTP
2
Which statement describes a characteristic of the network layer in the OSI model?
It manages the data transport between the processes running on each host.
In the encapsulation process, it adds source and destination port numbers
This answer is wrong. Do not select it.
Its protocols specify the packet structure and processing used
3
Which device is an intermediary device?
Firewall
Smart Device
Server
PC
4
What is the aim of an ARP spoofing attack?
to fill switch MAC address tables with bogus addresses
to flood the network with ARP reply broadcasts
to associate IP addresses to the wrong MAC address
to overwhelm network hosts with ARP requests
5
What is another term for the internet port of a wireless router?
local port
switch port
WAN port
LAN port
6
What do devices on the same IPv4 subnet have in common?
They all have a subnet mask of /8, /16, or /24.
They all have the same number in the first three octets of the IPv4 address
They all have the same last octet in their IPv4 addresses.
They all use the same default gateway.
7
Which protocol is used to discover the destination address needed to be added to an Ethernet frame?
ARP
DNS
DHCP
HTTP
8
Typically, which network device would be used to perform NAT for a corporate environment?
Host Device
Switch
Router
DHCP Server
9
Which statement is correct about network protocols?
Only required for exchange of messages between devices on remote networks.
Protocols define the type of hardware used and how it is mounted in racks.
Defines how messages are exchanged between the source and the destination.
They all function in the network access layer of TCP/IP.
10
Which information is used by routers to forward a data packet toward its destination?
source IP address
destination IP address
destination data-link address
source data-link address
11
The IP address of the computer is displayed as 169.254.0.2. What type of address is this?
Loopback
Private
Experimental
Link-Local
12
How many octets exist in an IPv4 address?
4
32
8
16
13
What is indicated by the 100 in the 100BASE-T standard?
feet
megabits per second
meters
twists per meter
14
What type of network is defined by 2 computers that can both send & receive requests for resources?
peer-to-peer
campus
enterprise
client/server
15
Which network feature uses redundancy as a means to limit the number of affected users in the event of a failure?
scalability
fault tolerance
security
quality of service
16
Characteristic of a network enables it to grow to support new users and applications without impacting performance.
scalability
reliability
quality of service
accessibility
17
Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?
Fragment Offset
Time-to-Live
Differentiated Services
Header Length
18
Which layer of the OSI model is responsible for the logical addressing of packets?
transport
network
data link
session
19
Which wireless technology uses a device-pairing process to communicate and operates over short distances of 100 meters?
GPS
Wireless wide-area-network
Wi-Fi
Bluetooth
20
Which destination IPv4 address does a client use to send an initial DHCP Discover packet when looking for a DHCP server?
127.0.0.1
224.0.0.1
the IP address of the default gateway
255.255.255.255
21
What is the range of hexadecimal values that can be used in a hextet?
0000 to 9999
0000 to 1111
0000 to ffff
1111 to aaaa
22
A student purchased a new Wi-Fi-enabled tablet computer. What is required to connect this device to the internet?
a wireless LAN
a telephone company
a mobile phone service provider
a 3G or 4G network
23
Which statement describes one purpose of the subnet mask setting for a host?
It is used to describe the type of the subnet.
Used to determine the max number of bits within one packet on the network
It is used to determine to which network the host is connected.
It is used to identify the default gateway.
24
A user is able to ping www.cisco.com by its IP address but cannot browse to www.cisco.com. What is the possible cause?
The IP address of the gateway is wrong.
The DNS server is not working.
The DHCP server is not configured correctly.
The IP address of the source PC is wrong.
25
What process is used to place one message inside another message for transfer from the source to the destination?
The source MAC address of the incoming port
Decoding
Access Control
Encapsulation
26
Which property of the IPv4 configuration identifies the network and host portion for an IPv4 address
DHCP server address
subnet mask
DNS server address
default gateway
27
Host A needs to send data to the server, but does not know its MAC address. What MAC address will be in the reply?
00:0C:00:B4:00:10
02:C8:00:7D:12:33
00:0D:00:B4:12:F3
00:0C:00:B4:00:24
28
What are two methods typically used on a mobile device to provide internet connectivity? (Choose two.)
cellular
Bluetooth
Wi-Fi
NFC
29
What was the reason for the creation and implementation of IPv6?
to make reading a 32-bit address easier
to provide more address space in the Internet Names Registry
to allow NAT support for private addressing
to relieve IPv4 address depletion
30
Which destination address is used in an ARP request frame?
255.255.255.255
FE80::1
0.0.0.0
FFFF.FFFF.FFFF
31
What configuration mode should be entered in order to use the "login" command?
privileged EXEC mode
global configuration mode
any line configuration mode
user executive mode
32
Which two protocols are used in the process of sending and receiving emails? (Choose two.)
FTP
POP
SMTP
HTTP
33
Which type of access is secured on a Cisco router or switch with the
enable secret
command?
privileged EXEC
console line
virtual terminal
AUX port
34
If the default gateway is configured incorrectly on a host, what is the impact on communications?
The host is unable to communicate with hosts on remote networks.
The host is unable to communicate on the local network.
Host is unable to communicate with hosts on the local and remote networks.
The host cannot get an IP address from the DHCP server.
35
The IP address 209.165.201.10 is attempting to communicate with IP address 192.168.25.10. Why won't this work?
This is a link-local address
This is a MAC address
This is a loopback address
This is a private IP address
36
What is one function of the ARP protocol?
maintaining a table of domain names with their resolved IP addresses
mapping a domain name to its IP address
obtaining an IPv4 address automatically
resolving an IPv4 address to a MAC address
37
Which command line utility is used to display active network connections on a PC?
ipconfig
nslookup
ipconfig /all
netstat
38
What important information is examined in the Ethernet frame header by a Layer 2 device to forward the data onward?
destination IP address
source MAC address
source IP address
destination MAC address
39
What function does pressing the Tab key have when entering a command in IOS?
It moves the cursor to the beginning of the next line.
It completes the remainder of a partially typed word in a command.
It aborts the current command and returns to configuration mode.
It exits configuration mode and returns to user EXEC mode.
40
Command could be used on the network hosts to see what MAC address the hosts are using to reach the default gateway?
ipconfig /all
arp -a
netstat -r
route print
41
Which wireless technology allows a customer to connect to a payment system with a smartphone?
Bluetooth
GPS
Wi-Fi
NFC
42
Which type of wireless communication is based on 802.11 standards?
Cellular WAN
Infrared
Wi-Fi
Bluetooth
43
What addressing information is recorded by a switch to build its MAC address table?
the destination Layer 3 address of incoming packets
the destination Layer 2 address of outgoing frames
the source Layer 2 address of incoming frames
the source Layer 3 address of outgoing packets
44
What is the purpose of the subnet mask in conjunction with an IP address?
to uniquely identify a host on a network
to identify whether the address is public or private
to determine the subnet to which the host belongs
to mask the IP address to outsiders
45
Which command can an administrator execute to determine what interface a router will use to reach remote networks?
show arp
show interfaces
show ip route
show protocols
46
Which two parts are components of an IPv4 address? (Choose two.)
network portion
host portion
subnet portion
physical portion
47
At which layer of the TCP/IP model does TCP operate?
internetwork
application
network access
transport
48
Which layer of the OSI model defines services to segment and reassemble data for communications between end devices?
Transport
Session
Network
Application
49
When is UDP preferred to TCP?
when segments must arrive in specific sequence to be processed successfully
when an application can tolerate some loss of data during transmission
when a client sends a segment to a server
when all the data must be fully received before any part of it is useful
50
Which type of network cable consists of 4 pairs of twisted wires?
Coaxial
Category 5e
Ethernet over powerline
fiber optic
51
What does a double colon (::) represent in an IPv6 address notation?
a continuous string of one or more hextets that contain only zeros
the beginning of the MAC address assigned to the IPv6 device
the boundary between the network portion and host portion of the address
at least eight occurrences of the same non-zero value
52
What DHCP message is sent by the server to let the client know it is able to use the provided IP information?
DHCP REQUEST
DHCP OFFER
DHCP DISCOVER
DHCP ACK
53
What is the purpose of the OSI physical layer?
controlling access to media
transmitting bits across the local media
performing error detection on received frames
exchanging frames between nodes over physical network media
54
What protocol header information is used at the transport layer to identify a target application?
MAC address
port number
sequence number
IP address
55
How many bits are in an IPv4 address?
128
32
64
256
56
Which three factors should be considered when choosing the appropriate network media? (Choose THREE.)
the amount of data and the data transfer rate desired
the distance between hosts that the media will connect
the environment in which the media is installed
the operating systems used on network devices in the network
57
What is one difference between using Telnet or SSH to connect to a network device for management purposes?
Telnet does not provide authentication whereas SSH provides authentication.
Telnet supports a host GUI whereas SSH only supports a host CLI.
Telnet uses UDP as the transport protocol whereas SSH uses TCP.
Telnet is in Plain Text. SSH is Encrypted.
58
Which piece of software is responsible for creating VMs and providing them access to resources on a physical machine?
host operating system
supervisor
hypervisor
hosted operating system
59
Which type of packet is sent by a DHCP server after receiving a DHCP Discover message?
DHCP ACK
DHCP Request
DHCP Offer
DHCP Discover
60
What networking term describes a particular set of rules at one layer that govern communication at that layer?
Protocol
Encapsulation
Duplex
Error Checking
61
A PC is configured with both IPv4 and IPv6 addresses. What IPv4 and IPv6 coexistence strategy is implemented on the PC
NAT64
NAT
Tunneling
Dual stack
62
Which term is associated with Cloud computing?
wireless
tall servers
virtualization
teleworkers
63
What wireless router configuration would stop outsiders from using your home network?
IP Address
Encryption
Router Location
Network Name
64
Which type of network cable is commonly used to connect office computers to the local network?
Plastic Fiber-optic Cable
Twisted-Pair Cable
Coaxial Cable
Glass Fiber-optic Cable
65
Which term describes a network device with the primary function of providing information to other devices?
Workstation
Client
Console
Server
66
Which command will provide the most information about the status of all interfaces?
show history
show ip interface brief
show running-config
show interfaces
67
Which statement is correct about network protocols?
They define how messages are exchanged between source and the destination.
They all function in the network access layer of TCP/IP.
Only required for exchange of messages between devices on remote networks.
Protocols define the type of hardware used and how it is mounted in racks.
68
A company uses cloud services and is setting up a new switch supplied by the cloud provider. Which cloud model is used?
IaaS
PaaS
DaaS
SaaS
69
Which two parts are components of an IPv4 address? (Choose two.)
Subnet Portion
Host Portion
Physical Portion
Network Portion
70
What is the purpose of using twisted pairs of wires in an Ethernet cable?
to identify paths of data flow
to provide higher bandwidth
to reduce interference
Better transmission of electrical signals over longer distances
71
What will a host on a network do if it receives a frame with a unicast destination MAC that does not match its own MAC?
It will forward the frame to the next host.
It will discard the frame.
It will remove the frame from the media.
It will strip off the data-link frame to check the destination IP address.
72
What type of cabling is shown?
Unshielded Twisted Pair
Fiber
Coaxial
Shielded Twisted Pair
73
What criterion must be followed in the design of an IPv4 addressing scheme for end devices?
Each IP address needs to be compatible with the MAC address.
Each IP address must match the address that is assigned to the host by DNS.
All hosts should be assigned an IP address w/ a unique network component.
Each IP address must be unique within the local network.
74
What is the purpose of the FCS field in a frame?
to compute the CRC header for the data field
to obtain the MAC address of the sending node
to verify the logical address of the sending node
to determine if errors occurred in the transmission and reception
75
How many bits make up an octet in an IPv4 address?
32
16
4
8
76
What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?
It notifies the sending host that the frame cannot be delivered.
It forwards the frame out all ports but the port the frame was received on.
It broadcasts the frame out of all ports on the switch.
It initiates an ARP request.
77
What is the purpose of NAT?
assigning a private IP address to a host for internet access
allowing hosts configured with registered public IPs to access the internet
routing private IP addresses over the public internet
translating private IP addresses to a public registered IP address
78
What role does a router play on a network?
selecting the path to destination networks
forwarding frames based on a MAC address
forwarding Layer 2 broadcasts
connecting smaller networks into a single broadcast domain
79
A technician determines a computer has not been given a correct IP address. Which command can solve this issue?
ipconfig /renew
ping
tracert
ipconfig /release
80
What characteristic of a network would allow video traffic to have priority over traffic from an email application?
scalability
reliability
quality of service
fault tolerance
81
Which address should be configured as the default gateway address of a client device?
the IPv4 address of the router interface that is connected to the same LAN
the IPv4 address of the router interface that is connected to the internet
the Layer 2 address of the switch management interface
the Layer 2 address of the switch port that is connected to the workstation
82
What are two functions of end devices on a network? (Choose two.)
They are the interface between humans and the communication network.
They direct data over alternate paths in the event of link failures.
They filter the flow of data to enhance security.
They originate the data that flows through the network.
