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Network and Communications 2A > Module #5 > Flashcards

Module #5 Flashcards

1
Q

What command can a technician use on a computer to see if DNS is functioning properly?
ipconfig
net share
nslookup
net use

A

nslookup

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2
Q

Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)

physical
data link
network
transport
session

A

network
transport

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3
Q

What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?

provides the flexibility to support any of Ethernet speeds
has a lower latency appropriate for high-performance computing applications
makes a fast forwarding decision based on the source MAC address of the frame
has a positive impact on bandwidth by dropping most of the invalid frames

A

has a lower latency appropriate for high-performance computing applications

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4
Q

Which solution improves web response time by deploying multiple web servers and DNS servers?

memcaching
distributed databases
sharding
load balancing

A

load balancing

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5
Q

What will a host on an Ethernet network do if it receives a frame with a unicast destination MAC address that does not match its own MAC address?

It will remove the frame from the media.
It will forward the frame to the next host.
It will strip off the data-link frame to check the destination IP address.
It will discard the frame.

A

It will discard the frame.

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6
Q

What is the common term given to SNMP log messages that are generated by network devices and sent to the SNMP server?

auditing
warnings
acknowledgments
traps

A

traps

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7
Q

What is the function of the Nslookup utility?

to manually force a client to send a DHCP request
to display all cached DNS entries on a host
to view the network settings on a host
to manually query the name servers to resolve a given host name

A

to manually query the name servers to resolve a given host name

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8
Q

What type of address is 01-00-5E-0A-00-02?

an address that reaches every host in the network
an address that reaches every host inside a local subnet
an address that reaches a specific group of hosts
an address that reaches one specific host

A

an address that reaches a specific group of hosts

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9
Q

A high school in New York (school A) is using videoconferencing technology to establish student interactions with another high school (school B) in Russia. The videoconferencing is conducted between two end devices through the Internet. The network administrator of school A configures the end device with the IP address 209.165.201.10. The administrator sends a request for the IP address for the end device in school B and the response is 192.168.25.10. Neither school is using a VPN. The administrator knows immediately that this IP will not work. Why?

This is a link-local address.
This is a private IP address.
There is an IP address conflict.
This is a loopback address.

A

This is a private IP address.

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10
Q

Refer to the exhibit. An organization is using static NAT to translate the private IP address of Host A to a single public IP address leased from the ISP. Which address is the inside global address of Host A?

209.165.202.129
203.0.113.2
192.168.2.253
192.168.1.1
192.168.1. 10

A

209.165.202.129

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11
Q

Consider the following routing table entry for R1:

D 10.1.1.0/24 [90/2170112] via 209.165.200.226, 00:00:05, Serial0/0/0

It is the interface on the final destination router that is directly connected to the 10.1.1.0/24 network.
It is the R1 interface through which the EIGRP update was learned.
It is the interface on the next-hop router when the destination IP address the 10.1.1.0/24 network.
It is the interface on R1 used to send data that is destined for 10.1.1.0/24.

A

It is the interface on R1 used to send data that is destined for 10.1.1.0/24.

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12
Q

A device has an IPV6 address listed as 2001:0DB8:75a3:0214:0607:1234:aa10:ba01. What is the interface ID of the device?

2001:0DB8:75a3
ba01
0607:1234:aa10:ba01
2001:0DB8

A

0607:1234:aa10:ba01

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13
Q

In what two situations would UDP be the preferred transport protocol over TCP? (Choose two.)

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated
when a faster delivery mechanism is needed
when delivery overhead is not an issue
when applications do not need to guarantee delivery of the data
when destination port numbers are dynamic

A

when a faster delivery mechanism is needed
when applications do not need to guarantee delivery of the data

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14
Q

Refer to the exhibit. A computer that is configured with the IPv4 address as shown in the exhibit is unable to access the internet. What is the problem?​

The gateway address is in the wrong subnet.
The IP address is a network address.
The settings were not validated.
The IP address is a broadcast address.

A

The gateway address is in the wrong subnet.

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15
Q

What IPv4-related DNS record type is used by a DNS server in response to a host requesting for a web server address via the URL?

AAAA record
NS record
A record
MX record

A

A record

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16
Q

In what two situations would UDP be better than TCP as the preferred transport protocol? (Choose two.)

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated
when a faster delivery mechanism is needed
when delivery overhead is not an issue
when applications do not need to guarantee delivery of the data
when destination port numbers are dynamic

A

when a faster delivery mechanism is needed
when applications do not need to guarantee delivery of the data

17
Q

Name the 7 OSI Model

A
  1. Phyiscal
  2. Data Link
  3. Network
  4. transport
  5. session
  6. presentation
  7. application
18
Q

Refer to the exhibit. The PC is sending a packet to the Server on the remote network. Router R1 is performing NAT overload. From the perspective of the PC, match the NAT address type with the correct IP address. (Not all options are used.)

203.0.113.5
192.0.2.1
10.130.5.76

A

Outside Gobal
Inside Global
Inside Local

19
Q

Match the Layer 2 frame field names to the correctly ordered locations for an Ethernet frame. Fields should be ordered from the beginning of the Ethernet frame to the end.

A
  1. Preamble
  2. SFD
  3. Destination Address
  4. Source Address
  5. Ether Type
  6. Data
  7. FCS
20
Q

Which statement describes the ping and tracert commands?

Tracert shows each hop, while ping shows a destination reply only.
Tracert uses IP addresses; ping does not.
Both ping and tracert can show results in a graphical display.
Ping shows whether the transmission is successful; tracert does not.

A

Tracert shows each hop, while ping shows a destination reply only.

21
Q

Which IPv6 address is most compressed for the full FE80:0:0:0:2AA:FF:FE9A:4CA3 address?​

FE80:::0:2AA:FF:FE9A:4CA3​
FE8::2AA:FF:FE9A:4CA3​
FE80::0:2AA:FF:FE9A:4CA3​
FE80::2AA:FF:FE9A:4CA3

A

FE80::2AA:FF:FE9A:4CA3

22
Q

Which command can be used on Linux and MAC hosts to get IP addressing information?

networksetup -getinfo
ipconfig
ip address
ifconfig

A

ifconfig

23
Q

What type of IPv6 address is FE80::1?

global unicast
loopback
link-local
multicast

A

link-local

24
Q

Which two statements are true about NTP servers in an enterprise network? (Choose two.)

There can only be one NTP server on an enterprise network.
NTP servers control the mean time between failures (MTBF) for key network devices.
NTP servers at stratum 1 are directly connected to an authoritative time source.
All NTP servers synchronize directly to a stratum 1 time source.
NTP servers ensure an accurate time stamp on logging and debugging information.

A

NTP servers at stratum 1 are directly connected to an authoritative time source.
All NTP servers synchronize directly to a stratum 1 time source.
NTP servers ensure an accurate time stamp on logging and debugging information.

25
Q

A small-sized company has 30 workstations and 2 servers. The company has been assigned a group of IPv4 addresses 209.165.200.224/29 from its ISP. The two servers must be assigned public IP addresses so they are reachable from the outside world. What technology should the company implement in order to allow all workstations to access services over the Internet simultaneously?

static NAT
dynamic NAT
DHCP
port address translation

A

port address translation

26
Q

Which statement describes a stateful firewall?

It can determine if the connection is in the initiation, data transfer, or termination phase.
It can expand the number of IP addresses available and can hide network addressing design.
It can filter packets based on information at Layers 3, 4, 5 and 7 of the OSI reference model.
It can only filter packets based on limited Layer 3 and 4 information.

A

It can determine if the connection is in the initiation, data transfer, or termination phase.

27
Q

Which impact does adding a Layer 2 switch have on a network?

an increase in the number of dropped frames
an increase in the size of the broadcast domain
an increase in the size of the collision domain
an increase in the number of network collisions

A

an increase in the size of the broadcast domain

28
Q

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.
The UDP destination port number identifies the application or service on the server which will handle the data.
UDP segments are encapsulated within IP packets for transport across the network.
TCP is the preferred protocol when a function requires lower network overhead.
The TCP source port number identifies the sending host on the network.
The TCP process running on the PC randomly selects the destination port when establishing a session with the server.

A

The source port field identifies the running application or service that will handle data returning to the PC.
The UDP destination port number identifies the application or service on the server which will handle the data.
UDP segments are encapsulated within IP packets for transport across the network.

29
Q

What is the function of the MIB element as part of a network management system?

to send and retrieve network management information
to change configurations on SNMP agents
to store data about a device
to collect data from SNMP agents

A

to store data about a device

30
Q

Which two devices allow hosts on different VLANs to communicate with each other? (Choose two.)

Layer 3 switch
hub
Layer 2 switch
repeater
router

A

Layer 3 switch
router

31
Q

What is obtained when ANDing the address 192.168.65.3/18 with its subnet mask?

192.168.32.0
192.168.64.0
192.168.0.0
192.168.16.0

A

192.168.64.0

Network and Communications 2A (8 decks)

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