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A+1-101 > 2.0 > Flashcards

2.0 Flashcards

1
Q

What blocks unwanted traffic ?

A

Firewall

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2
Q

What is a firewalls set of rules called ?

A

Access Control List (ACL)

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3
Q

What two simple things can you change to make a wireless network more secure ?

A

Change the SSID and change the deafult Admin name and password.

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4
Q

What is a DHCP reservation ?

A

A host is always given an IP address (from the scope) based on the devices MAC address

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5
Q

You need to prevent users from accessing certain websites. What kind of server should you use ?

A

Proxy server.

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6
Q

What protocol is responsible for sending emails ?

A

SMTP 25

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7
Q

What command is used to trace the path taken by packets to a particular destination ?

A

Tracert

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8
Q

What is a scope in DHCP ?

A

A consecutive range of IP addresses that a DHCP server can draw on to fulfill an IP address request from a DHCP client

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9
Q

What does a bridge do ?

A

Divides a logical bus network into segments

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10
Q

What does a switch do ?

A

Joins multiple multiple computers together on the same LAN.

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11
Q

What tool should you use to locate a wire from wall into a patch panel ?

A

Toner Probe

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12
Q

What two devices can be at the center of a star topology ?

A

Hub or Switch

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13
Q

What 802.11 standard introduced OFDMA (Orthogonal Frequency Division Multiple Access) ?

A

802.11ax

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14
Q

What will a DNS server do if it cannot resolve a name ?

A

Query the root DNS server

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15
Q

Which feature of a wireless router allows only specified computers to access the network?

A

MAC filtering.
MAC addresses are specific to the device.

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16
Q

What is the max speed and frequency spectrum is availible for 802.11n ?

A

2.4Ghz and 5Ghz
600Mbps

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17
Q

What protocol is used to access data stored in a information directory ?

A

LDAP

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18
Q

Which of the following formats best describes the address provided by the vendor?
192.168.15.2/32.

A

IPv4 CIDR format

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19
Q

What is the function of a loopback plug?

A

Test the functionality of NICs

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20
Q

What port is DHCP ?

A

67 for server destination and 68 for Client

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21
Q

Would the IP address 10.25.11.33 be valid for a DNS on the internet ?

A

No 10.x.x.x or 10.25.11.33 is within a private address space.

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22
Q

Your computers IP address is assigned 169.254.1.18. What does this mean ?

A

This a APIPA (Automatic Private IP Addressing) address. Your computer is assigned this when it cannot reach the DHCP server.

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23
Q

What network connectivity device stops broadcasts from being sent to computers on a different network segment ?

A

Router

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24
Q

What is the lowest grade of cable required to run 100BaseT?

A

CAT 5

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25
Q

What bandwidth and frequency spectrum is allowed on 802.11g ?

A

2.4Ghz and 54Mbps

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26
Q

Maximum dial up speed ?

A

56Kbps

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27
Q

What is a router’s IP address also known as ?

A

Default Gateway

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28
Q

Will a DNS work on a private network ?

A

Yes. Just need to set it up.

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29
Q

What does ARP (Address Resolution Protocol) do ?

A

Resolves IP addresses to hardware (MAC) addresses.

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30
Q

What does a DHCP server do ?

A

Automatically assigns IP addresses to clients.

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31
Q

What will a router use to help determine the correct destination path for packets ?

A

Internal routing tables

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32
Q

What is the deault port number for RDP ?

A

3389

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33
Q

What appliance combines multiple security services and features for users to manage ?

A

Unified Threat Management (UTM)
Usually a combination of firewalls and antivirus’s.

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34
Q

Name two advantages of storage area networks ?

A

More efficient data storage
Faster Data access

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35
Q

What is Basic Service Set ?

A

A feature of Wi-fi 6 that reduces channel interference.

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36
Q

What connection oriented protocol is used to secure a telnet session ?

A

SSH

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37
Q

What protocols are used to securely retrieve mail ?

A

IMAP4 and POP3

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38
Q

What does OFDM (orthogonal frequency division multiplexing) do ?

A

Accomplishes communication by breaking the data into subsignals and transmitting them simultaneously.

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39
Q

What is a DHCP relay agent?

A

Forwards the DHCP messages to other subnets so that the DHCP server does not have to be on the same subnet as the DHCP clients

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40
Q

What hardware device is capable of creating VLANs ?

A

Managed switch

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41
Q

Which network protocol is used for the administration of networking devices, such as routers and switches, and which port(s) does it use ?

A

SNMP (Simple Network Management Protocol) 161 and 162

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42
Q

What network topology allows for the greatest level of redundancy and fault tolerance ?

A

Mesh

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43
Q

APIPA addresses are always between the range of….

A

169.254.0.1 and 169.254.255.254

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44
Q

What is channel bonding ?

A

The combination of multiple smaller channels into one large channel for greater bandwidth

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45
Q

How do you ensure that network traffic is routed to the correct machine ?

A

Port Forwarding

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46
Q

What does a load balancer do ?

A

Spreads work across multiple servers

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47
Q

What layer of the TCP/IP model do port numbers exist ?

A

Layer 4

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48
Q

FTP

A

TCP 20 and 21

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49
Q

What port numbers are TCP 20 and 21 assigned to ?

50
Q

SMTP port number

51
Q

What protocol uses TCP 25 ?

52
Q

What is SMTP primarily used for ?

A

Sending mail to a server
Server to server email transfers too.

53
Q

Telnet port number ?

54
Q

What protocol uses TCP 23 ?

55
Q

What is Telnet ?

A

Text based comms (command line) used to connect to a remote console of another device.

56
Q

SSH port number

57
Q

What protocal is TCP 22

58
Q

What is SSH ?

A

Encrypted communication with password and public key authentication.

59
Q

DNS port number

60
Q

What protocol is UDP 53

61
Q

What does DNS do ?

A

Converts IP to addresses and vica versa

62
Q

DHCP port number

63
Q

What protocol is UDP 67/68 ?

64
Q

What is DHCP ?

A

The automatic configuration of IP, addresses, subnet mask and some other to options devices on a network.

65
Q

What are DHCP servers integrated into ?

A

SOHO routers

66
Q

HTTP and HTTPS port numbers ?

A

TCP 80 and TCP 443

67
Q

What protocols are TCP 443 and TCP 80 ?

A

HTTPS and HTTP

68
Q

What does HTTP and HTTPS do ?

A

Web server comms in the clear (HTTP) and encrypted (HTTPS)

69
Q

POP3 and IMAP4 port numbers ?

A

TCP 110 and TCP 143

70
Q

What protocols are TCP 110 and TCP 143 ?

A

POP3 and IMAP4

71
Q

What’s the difference between POP3 and IMAP4 ?

A

POP3 is basic and doesnt involve the synching of mailboxes across multiple devices. IMAP involves this and management.

72
Q

NetBIOS port number ?

A

UDP 137/139

73
Q

What protocol is UDP 137/139 ?

74
Q

SMB port number ?

75
Q

What protocol is TCP 445 ?

76
Q

What is SMB ?

A

File sharing, printer sharing SMB is comms over TCP without NetBIOS transport.

77
Q

SNMP port number ?

A

UDP 161/162

78
Q

What protocol is UDP 161/162 ?

79
Q

What does SNMP do ?

A

Gathers stats from network devices

80
Q

LDAP port number ?

81
Q

What protocol is TCP 389 ?

82
Q

What is LDAP ?

A

Store and retrieve info from a network directory e.g. Active directory

83
Q

RDP port number ?

84
Q

What protocol is TCP 3389 ?

85
Q

What is RDP ?

A

Sharing a desktop from a remote location.

86
Q

Define what hubs and switches do ?

A

They are used to create networks

87
Q

Define what routers do ?

A

They are used to connect networks.

88
Q

You have recently set up a network that will use the TCP/IP protocol, and you want to resolve hostnames to IP addresses. Which type of servers will help ?

89
Q

List the non routable IP address ranges

A

10.0.0.0-10.255.255.255
172.16.0.0-172.31.255.255
192.168.0.0-192.168.255.255.

90
Q

What is the best way to ensure that only clients with the correct hardware addresses access the wireless router

A

MAC filtering will only allow specific computer to access the wireles router.

91
Q

What is the lowest grade of cable required to run 100BaseT?

92
Q

Where can a antispam gateway be located ?

A

In the cloud or on an internal network

93
Q

What is a facility code ?

A

A number between 0 and 23 that identifies the type of device sending the message.

94
Q

What is the functionality of a loopback plug ?

A

Testing the functionality of a NIC

95
Q

What is APIPA ?

A

Automatic Private IP addressing.

96
Q

What does APIPA do ?

A

If a DHCP server cannot be found a device will automatically assign themselves a IP address in the 169/254.x.x range and a subnet mask 255.255.0.0

97
Q

You use ipconfig on your laptop to see it has been assigned the IP Address 169.254.xxx.xxx. Why has this happened ?

A

It has been assigned an APIPA address which prevents it from communicating with the DHCP server.

98
Q

What does pinging 127.0.0.1 do ?

A

The loopback address interface allows IT professionals to test IP software without worrying about broken or corrupted drivers or hardware.

99
Q

You’re watching your IT manage on his computer. At the command line interface he types the following

nbtstat -A 192.168.1.90

What is he doing ?

A

He’s using the nbtstat command to otbtain the windows name (NetBIOS information) of a remote/non local device.

100
Q

What would be the best way to measure the voltage of a motherboard power rail ?

A

Set a multimeter for DC

101
Q

What DNS record do you associated with an IPv6 address ?

102
Q

What DNS record do you associated with an IPv4 address ?

103
Q

What DNS record do you associated with outgoing (SMTP) and incoming (POP3/IMAP) traffic ?

104
Q

What are the private address ranges ?

A

10.x.x.x
172.16-31.x.x
192.168.x.x.

105
Q
A

F,d,b,a,g,e,c

108
Q

What is a sympton of severe RAM issues ?

A

Continous reboots

109
Q

When will a device check in with a DHCP server about the lease time ?

A

Around half way through the alloted time

110
Q

What are the wifi channels allowed in the USA, Europe and Japan ?

A

1-11
1-13
1-14

111
Q

What is Zigbee used for ?

A

Home automation

112
Q

What is a intrusion prevention system (IPS) ?

A

A form of network security that detects and prevents identified threats

113
Q

What has more downtime, a server or a VM ?

A

A server will typically have more downtime

114
Q

What PCIe version will Network adapters and Wi-Fi network cards almost exclusively rely on ?

115
Q

What device devides networks into subnets ?

116
Q

Name the page description languages ?

A

Printer control language (PCL) and PostScript (PS)

117
Q

Which of the following produces higher quality outputs
Printer control language (PCL) or PostScript (PS)

A

PostScript (PS)

118
Q

Where would you MOST likely configure PXE to set up remote imaging on a computer during a deployment?

A

Preboot Execution Environment (PXE) is configured in the BIOS boot option

119
Q

What is the most commonly used key used to enter the BIOS / UEFI boot order menu ?

120
Q

Which network technology is used to prioritize certain types of network traffic over others?

121
Q

Which network performance metric is used to represent variable delay experienced by a client when receiving packets from a sender

122
Q

What is an embeded system ?

A

a computer system designed to perform a specific, dedicated function

A+1-101 (5 decks)

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