topic 6

Question 1

What is the 7 layer OSI model?

Answer 1

1. physical
2. data link
3. network
4. transport
5. session
6. presentation
7. application

Question 2

What is TCP/IP model?

Answer 2

1. Network Interface
2. Internet
3. Transport
4. Aplication

Question 3

What is CRC?

Answer 3

CRC is cyclic redundancy check. It is to verify if data is good, if data bad it will resend.

Question 4

How many bits is in MAC address?

Answer 4

48bits

Question 5

How many bits are there in a byte?

Answer 5

8bits

Question 6

What is unicast transmission?

Answer 6

it is a frame that is addressed to a single device on the network.

Question 7

What is broadcast transmission?

Answer 7

it is a frame that is addressed to every device in a broadcast domain.

Question 8

What does a broadcast address look like?

Answer 8

FF-FF-FF-FF-FF-FF

Question 9

What is TCP?

Answer 9

Transmission control portocol. It is a connection oriented conversation between two computers. It makes sure that the data gets to you whole complete in order.

Question 10

What is UDP?

Answer 10

User Datagram protocol. It is not connection oriented. one computer sents the data and hopes that you’re ready for it.

Question 11

What are port numbers?

Answer 11

port numbers help direct packet tarffic between the source and destination.

Question 12

What is a WAP?

Answer 12

Wireless access point. A WAP is a bridging device that connects into an Ethernet network and communicates via radio waves to wireless clients.

Question 13

What is SSID?

Answer 13

Service set identifier. It is a word of phrase used to connect wireless devices to the WAP device.

Question 14

What is CSMA/CA?

Answer 14

CSMA/CA is the method used to prevent wireless collisions.

Question 15

What is 802.11a?

Answer 15

• 5GHz range
• 8 channels @ 54Mbps
• 300 feet

Question 16

What is 802.11b?

Answer 16

• 2.4Ghz range
• 3 channels @ 11Mbps
• 450 feet

Question 17

What is 802.11g?

Answer 17

• 2.4Ghz range
• 3 channels @ 54Mbps
• backward compatible with 802.11a and 802.11b
• 300 feet

Question 18

What is 802.11n?

Answer 18

• 2.4/5 Ghz
• up to 600Mbps
• 450 feet

Question 19

What is 802.11ac?

Answer 19

• 5Ghz

- 1 Gbps ++

Question 20

What are the components of a network?

Answer 20

1. Ethernet hub
2. Network switches
3. Routers
4. Firewall

Question 21

What is the purpose of ethernet hub?

Answer 21

1. distribute packets to and from devices that are connected to it
2. It uses broadcast transmission
3. cleans the digital signal sent to it
4. works in the physical layer of OSI

Question 22

What is the purpose of network switches?

Answer 22

1. forward traffic to selected destination
2. packet filtering
3. unicast transmission
4. works in the data link layer of OSI

Question 23

What is the purpose of a router?

Answer 23

1. router works at layer 3, the network layer.

2. forward data packets to networks

Question 24

What is the purpose of firewall?

Answer 24

1. limit access to that network from external network.

Question 25

What is HIS?

Answer 25

hospital information system.

Question 26

What does MSH stand for?

Answer 26

message header

Question 27

What does PID stand for?

Answer 27

patient identification

Question 28

What does NK1 stand for?

Answer 28

Next of Kin

Question 29

What does PV1 stand for?

Answer 29

patient visit - doctors, dates

Question 30

What does SCH stand for?

Answer 30

scheduling activity information

Question 31

What does OBR stand for?

Answer 31

observation results

Question 32

What does BLG stand for?

Answer 32

billing

Question 33

What does AL1 stand for?

Answer 33

allergy

Question 34

What are some examples of connected healthcare?

Answer 34

Medical Device integration @ SingHealth it collects patients viral sign data and stores it in the electronic medical records (EMR) system wirelessly. It helps eliminate time taken to manual record data.