Wired/Wireless network topology/IOT

Question 1

Physical topology?

Answer 1

How devices are physically connected by media

Question 2

Logical Topology

Answer 2

How the actual traffic flows in the newtork

Question 3

Bus Topology

Answer 3

• Uses cable running through area that required network connectivity
• Each device “taps” into cable using t connector
• Old tech, not common anymore
• Devices on cable form single collision domain

Question 4

Ring topology

Answer 4

• Uses cable running in circular loop
• Each device connects to the ring, but data travels in a singular direction
• FDDI (Fiber networks) used two counter-rotating rings for redundancy
• On token ring networks, devices wait for a turn to communicate on ring
  by passing a token

Question 5

Star Topology

Answer 5

Most popular physical LAN topology
▪ Devices connect to a single point
▪ Commonly used with Ethernet cabling, but wireless or fiber is also used
▪ If the central device fails, the entire network fails

Question 6

Hub and Spoke Technology

Answer 6

▪ Used for connecting multiple sites
▪ Similar to Star but with WAN links instead of LAN connections
▪ Not redundant, if central office (hub) fails, the whole network can fail

Question 7

Full Mesh topology

Answer 7

Most redundant topology
▪ Every node connects to every other node
▪ Optimal routing is always available
▪ Very expensive to maintain and operate
- number of connects x=n(n-1)/2

Question 8

Partial Mesh Topology

Answer 8

▪ Hybrid of the full-mesh and the hub-and-spoke topologies
▪ Provides optimal routes between some sites, while avoiding the expense
of connecting every site
▪ Must consider network traffic patterns to design it effectively

Question 9

Infrastructure Mode

Answer 9

Most common type of wireless network
▪ Requires centralized management
▪ Uses a wireless access point as a centralized point like a star topology
▪ Supports wireless security controls

Question 10

Ad hoc Mode

Answer 10

Decentralized wireless network
▪ No routers or access points are required
▪ Forwarding decisions for data on the network are made dynamically
▪ Allows creation/joining of networks “on-the-fly”
▪ Creates P2P connection

Question 11

Wireless Mesh Topology

Answer 11

▪ Interconnection of different types of nodes or devices
▪ Consists of clients, routers, and gateways
▪ Utilizes different radio frequencies to extend and expand access
▪ Reliable and redundant connections

Question 12

Internet of Things(IoT) Tech: 802.11

Answer 12

● Operates as infrastructure or ad hoc

Question 13

Bluetooth

Answer 13

● Low energy use variant of Bluetooth which allows for a mesh
network

Question 14

RFID

Answer 14

Uses electromagnetic fields to read data stored in embedded tags

Question 15

NFC

Answer 15

● Enables two electronic devices to communicate within a 4 cm
range

Question 16

Imfrared (IR)

Answer 16

● Operates with line of sight

Question 17

Z-Wave

Answer 17

Provides short-range, low-latency data transfer at rates and
power consumption lower than Wi-Fi
● Used primarily for home automation

Question 18

Ant+

Answer 18

● Collection and transfer of sensor data
● Used with remote control systems (tire pressure, TVs, lights)