IoT Tutorial (2)
1-What problems that we will face for IoT?
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1-There will be a problem in addressing because there will not be
a satisfied number of addresses for IoT nodes
2-The connection between these nodes because there are
different standards
2-What is the current scheme of addressing in IoT?
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IPv4
3-Talk about Connectivity Terminologies?
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1-IoT LAN
2-IoT WAN
3-IoT node
4-IoT Gateway
5-IoT proxy
4-Mention functions of Gateways?
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1-Internet connectivity
2-Intra LAN connectivity
5-What is the function of gateway in LAN network?
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Offer connectivity between the different nodes within a network
for upstream addressing, that means beyond the gateway
6-Describe the mechanism used in upstream addressing?
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DHCPv6
7-Describe the role of IPv6 in IoT?
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IPv6 can solve to wide extent the problem of addressing mention
before, but the current addressing scheme is IPv4, so to go from
IPv4 to IPv6 there is no currently possible solution for this
problem but there are alternatives which can solve this problem
partially: -
a) IPv4 to IPv6 translation
b) IPv6 tunneling over IPv4
c)Application layer proxies
8-Define the term multi-homing?
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A node in a network connected to may other networks for
increasing reliability
9-What is the main function of multi-homing?
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Improving the overall reliability
10-What are the approaches for multi-homing?
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a) A proxy-based approach
b) A gateway-based approach
11-What is the challenge that faces multi-homing? What is the
solution?
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The problem is giving the source address, the destination address
and information transferred to nodes
Solution:- IEFT id trying to standardize this issue
12-Compare between IPv4 and IPv6?
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                         IPv4                    IPv6
Developed                IEFT 1974               IEF 1998
Length (bits)            32                      128
No. of addresses         232                     2128
Notation                 Dotted decimal          Hexadecimal
Dynamic allocation       DHCP                    SLAAC/DHCPv6
of addresses
IPSec                    Optional                Compulsory
Header size              Variable                Fixed
Header checksum          Yes                     No
Header options           Yes                     No
Broadcast addresses      Yes                     No
Multicast address        No                      Yes
13-Draw IPv4 and IPv6 header format?
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14-Quiz: -
Draw illustration diagram that shows complete connection of
two LAN networks to the internet using gateways and proxies