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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
What bandwidth and frequency spectrum is allowed on 802.11g ?
2.4Ghz and 54Mbps
26
Maximum dial up speed ?
56Kbps
27
What is a router's IP address also known as ?
Default Gateway
28
Will a DNS work on a private network ?
Yes. Just need to set it up.
29
What does ARP (Address Resolution Protocol) do ?
Resolves IP addresses to hardware (MAC) addresses.
30
What does a DHCP server do ?
Automatically assigns IP addresses to clients.
31
What will a router use to help determine the correct destination path for packets ?
Internal routing tables
32
What is the deault port number for RDP ?
3389
33
What appliance combines multiple security services and features for users to manage ?
Unified Threat Management (UTM) Usually a combination of firewalls and antivirus's.
34
Name two advantages of storage area networks ?
More efficient data storage Faster Data access
35
What is Basic Service Set ?
A feature of Wi-fi 6 that reduces channel interference.
36
What connection oriented protocol is used to secure a telnet session ?
SSH
37
What protocols are used to securely retrieve mail ?
IMAP4 and POP3
38
What does OFDM (orthogonal frequency division multiplexing) do ?
Accomplishes communication by breaking the data into subsignals and transmitting them simultaneously.
39
What is a DHCP relay agent?
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
40
What hardware device is capable of creating VLANs ?
Managed switch
41
Which network protocol is used for the administration of networking devices, such as routers and switches, and which port(s) does it use ?
SNMP (Simple Network Management Protocol) 161 and 162
42
What network topology allows for the greatest level of redundancy and fault tolerance ?
Mesh
43
APIPA addresses are always between the range of....
169.254.0.1 and 169.254.255.254
44
What is channel bonding ?
The combination of multiple smaller channels into one large channel for greater bandwidth
45
How do you ensure that network traffic is routed to the correct machine ?
Port Forwarding
46
What does a load balancer do ?
Spreads work across multiple servers
47
What layer of the TCP/IP model do port numbers exist ?
Layer 4
48
FTP
TCP 20 and 21
49
What port numbers are TCP 20 and 21 assigned to ?
FTP
50
SMTP port number
TCP 25
51
What protocol uses TCP 25 ?
SMTP
52
What is SMTP primarily used for ?
Sending mail to a server Server to server email transfers too.
53
Telnet port number ?
TCP 23
54
What protocol uses TCP 23 ?
Telnet
55
What is Telnet ?
Text based comms (command line) used to connect to a remote console of another device.
56
SSH port number
TCP 22
57
What protocal is TCP 22
SSH
58
What is SSH ?
Encrypted communication with password and public key authentication.
59
DNS port number
UDP 53
60
What protocol is UDP 53
DNS
61
What does DNS do ?
Converts IP to addresses and vica versa
62
DHCP port number
UDP 67/68
63
What protocol is UDP 67/68 ?
DHCP
64
What is DHCP ?
The automatic configuration of IP, addresses, subnet mask and some other to options devices on a network.
65
What are DHCP servers integrated into ?
SOHO routers
66
HTTP and HTTPS port numbers ?
TCP 80 and TCP 443
67
What protocols are TCP 443 and TCP 80 ?
HTTPS and HTTP
68
What does HTTP and HTTPS do ?
Web server comms in the clear (HTTP) and encrypted (HTTPS)
69
POP3 and IMAP4 port numbers ?
TCP 110 and TCP 143
70
What protocols are TCP 110 and TCP 143 ?
POP3 and IMAP4
71
What's the difference between POP3 and IMAP4 ?
POP3 is basic and doesnt involve the synching of mailboxes across multiple devices. IMAP involves this and management.
72
NetBIOS port number ?
UDP 137/139
73
What protocol is UDP 137/139 ?
NetBIOS
74
SMB port number ?
TCP 445
75
What protocol is TCP 445 ?
SMB
76
What is SMB ?
File sharing, printer sharing SMB is comms over TCP without NetBIOS transport.
77
SNMP port number ?
UDP 161/162
78
What protocol is UDP 161/162 ?
SNMP
79
What does SNMP do ?
Gathers stats from network devices
80
LDAP port number ?
TCP 389
81
What protocol is TCP 389 ?
LDAP
82
What is LDAP ?
Store and retrieve info from a network directory e.g. Active directory
83
RDP port number ?
TCP 3389
84
What protocol is TCP 3389 ?
RDP
85
What is RDP ?
Sharing a desktop from a remote location.
86
Define what hubs and switches do ?
They are used to create networks
87
Define what routers do ?
They are used to connect networks.
88
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 ?
DNS
89
List the non routable IP address ranges
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
What is the best way to ensure that only clients with the correct hardware addresses access the wireless router
MAC filtering will only allow specific computer to access the wireles router.
91
What is the lowest grade of cable required to run 100BaseT?
Cat5
92
Where can a antispam gateway be located ?
In the cloud or on an internal network
93
What is a facility code ?
A number between 0 and 23 that identifies the type of device sending the message.
94
What is the functionality of a loopback plug ?
Testing the functionality of a NIC
95
What is APIPA ?
Automatic Private IP addressing.
96
What does APIPA do ?
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
You use ipconfig on your laptop to see it has been assigned the IP Address 169.254.xxx.xxx. Why has this happened ?
It has been assigned an APIPA address which prevents it from communicating with the DHCP server.
98
What does pinging 127.0.0.1 do ?
The loopback address interface allows IT professionals to test IP software without worrying about broken or corrupted drivers or hardware.
99
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 ?
He's using the nbtstat command to otbtain the windows name (NetBIOS information) of a remote/non local device.
100
What would be the best way to measure the voltage of a motherboard power rail ?
Set a multimeter for DC
101
What DNS record do you associated with an IPv6 address ?
AAAA
102
What DNS record do you associated with an IPv4 address ?
A
103
What DNS record do you associated with outgoing (SMTP) and incoming (POP3/IMAP) traffic ?
MX
104
What are the private address ranges ?
10.x.x.x 172.16-31.x.x 192.168.x.x.
105
F,d,b,a,g,e,c
106
107
108
What is a sympton of severe RAM issues ?
Continous reboots
109
When will a device check in with a DHCP server about the lease time ?
Around half way through the alloted time
110
What are the wifi channels allowed in the USA, Europe and Japan ?
1-11 1-13 1-14
111
What is Zigbee used for ?
Home automation
112
What is a intrusion prevention system (IPS) ?
A form of network security that detects and prevents identified threats
113
What has more downtime, a server or a VM ?
A server will typically have more downtime
114
What PCIe version will Network adapters and Wi-Fi network cards almost exclusively rely on ?
PCIex1
115
What device devides networks into subnets ?
Routers
116
Name the page description languages ?
Printer control language (PCL) and PostScript (PS)
117
Which of the following produces higher quality outputs Printer control language (PCL) or PostScript (PS)
PostScript (PS)
118
Where would you MOST likely configure PXE to set up remote imaging on a computer during a deployment?
Preboot Execution Environment (PXE) is configured in the BIOS boot option
119
What is the most commonly used key used to enter the BIOS / UEFI boot order menu ?
F12
120
Which network technology is used to prioritize certain types of network traffic over others?
QOS
121
Which network performance metric is used to represent variable delay experienced by a client when receiving packets from a sender
Jitter
122
What is an embeded system ?
a computer system designed to perform a specific, dedicated function

A+1-101 (5 decks)

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