General Cards (IT Level 3)

Question 1

TCP

Answer 1

Port: 445 / Reliable / Ensures packet arrives before sending next.

Question 2

UDP

Answer 2

Port: 53 / Best Effort / Keeps sending packets as it makes them, no checking if packets arrived.

Question 3

Name all the common VPN types.

Answer 3

PPTP (Point-to-point tunneling protocol)
L2TP (Layer 2 tunneling protocol) / IPsec
SSTP (Secure socket tunneling protocol)
IKEv2 (Internet Key Exchange version 2)
OpenVPN.

Question 4

Pros and cons of PPTP

Answer 4

Point-to-point tunneling protocol-
Pros:
 - Client built into most platforms
 - Easy to setup
Cons:
 -Insecure
 -Compromised by NSA
 -Easily blocked

Question 5

Pros and cons of L2TP

Answer 5

Layer 2 tunneling protocol-
Pros:
 -Considered secure
 -Easy to setup
 -Available on most modern platforms
 -Faster than OpenVPN
Cons:
 -Can struggle with restrictive firewalls
 -Often setup badly

Question 6

Pros and cons of SSTP

Answer 6

Secure socket tunneling protocol -
Pros:
 -Very secure
 -Integrated into windows
 -Microsoft support
 -Can bypass most firewalls
Cons:
 -Proprietary standard owned by Microsoft

Question 7

Pros and cons of IKEv2

Answer 7

Internet Key Exchange version 2 -
Pros:
 -Fast
 -Stable
 -Secure
 -Easy to setup on client devices
 -Support on Blackberry devices
Cons:
 -Not supported on many platforms
 -Implementing on server side is tricky

Question 8

Pros and cons of OpenVPN

Answer 8

OpenVPN -
Pros:
 -Very secure
 -highly configurable
 -Open source
 -Can by-pass firewalls
 -Need third party software
Cons:
 -?

Question 9

Name 3 ciphers

Answer 9

• Blowfish (32-448bits)
• AES (256 bits)
• Camellia (128-256bits)

Question 10

How does a HUB send data?

Answer 10

It broadcasts it to all devices on the network.

Question 11

How does a Switch send data?

Answer 11

It sends data to devices based on the MAC address.

Question 12

How does a Router send data?

Answer 12

It sends data to devices based on the IP address.

Question 13

Name the 3 ways a wireless network transmits data.

Answer 13

Omni-Directional - All directions over a wide area.
Semi-Directional - Transmits in a single direction providing a strong long-range signal in a specific direction.
Highly Directional - Transmits a narrow focused signal in a single direction, used in point-to-point systems.

Question 14

What does IEEE stand for?

Answer 14

the Institute of Electrical and Electronics Engineers

Question 15

What does IEEE 802.11 cover?

Answer 15

Implementation of wireless local area networks.

Question 16

What is the data transfer rate and frequency of IEEE 802.11a?

Answer 16

54Mbps / 5GHz

Question 17

What is the data transfer rate and frequency of IEEE 802.11b?

Answer 17

11Mbps / 2.4GHz

Question 18

What is the data transfer rate and frequency of IEEE 802.11g?

Answer 18

54Mbps / 2.4GHz

Question 19

What is the data transfer rate and frequency of IEEE 802.11n?

Answer 19

600Mbps / 2.4GHz

Question 20

What is the data transfer rate and frequency of IEEE 802.11ac?

Answer 20

1300Mbps / 5GHz

Question 21

What are the 5 IEEE 802.11 standards?

Answer 21

802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Question 22

What is the IEEE 802.15 standards?

Answer 22

This covers the development and implementation of Personal Area Networks (PANs)

Question 23

What is the range and transmitted power of IEEE 802.15 class 1?

Answer 23

100mW / 100 meters

Question 24

What is the range and transmitted power of IEEE 802.15 class 2?

Answer 24

2.5mW / 10 meters

Question 25

What is the range and transmitted power of IEEE 802.15 class 3?

Answer 25

1mW / Less than 10 meters (Commonly 1 meter)

Question 26

What is tethering?

Answer 26

Connecting a Wi-Fi enabled device to a smartphone to allow it to have internet via the smartphone's connection.

Question 27

What is NFC?

Answer 27

Near field communication, works from 4cm away.

Question 28

Name the types of wireless technologies.

Answer 28

WEP (Wireless equivalency privacy) WPA (Wi-Fi protected access) WPA2 (Wi-Fi protected access 2) WPA3 (Wi-Fi protected access 3)

Question 29

What is an SSID?

Answer 29

SSID is used to identify a wireless network, by default it is broadcasted which can be a vulnerability.

Question 30

MAC Address Filtering

Answer 30

Only allowing devices with a MAC address which is on a list, not very secure as a MAC address can be spoofed.

Question 31

What is remote assistant?

Answer 31

Allows users to send an invite for control and get control at a limited level.

Question 32

What is remote desktop?

Answer 32

Allows someone to control a device with full controls remotely.