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Compare Ad-hoc network and infrastructure network.

written 8.6 years ago by teamques10 ★ 69k

modified 2.8 years ago by pedsangini276 • 4.8k

computer networks

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written 8.6 years ago by teamques10 ★ 69k

Parameters	Infrastructure mode	Ad-hoc mode
What is it?	In infrastructure mode, the communication occurs only between the wireless nodes and access points (AP) , but not directly between wireless nodes	In ad-hoc mode, each node communicates directly with other nodes, so no access point control is needed.
External Communication	Access points acts as,a bridge to other wireless/wired network	Nodes in Ad-hoc can communicate if they are within the same range.
Physical needs	Physical infrastructure is needed	No physical infrastructure is needed.
Complexity	Designing is simple as most of the network functionality lies within AP and client is just a simple machine.	As no central co-ordination exists, we need to use decentralized MAC protocols such as CSMA/CA, with all nodes having same functionality. This shoots up the complexity and cost.
When it can’t be used:	It can’t be used in critical situations like disaster relief where no infrastructure is left.	It is not always fully connected as two mobile nodes may temporarily be out of range.
Applications	IEEE 802.11 & HIPERLAN2 are based on infrastructure mode.	Bluetooth is a typical ad-hoc network.
Channel Access	Most infrastructure based WLAN uses TDMA-based protocols	Most Ad-hoc based WLAN uses contention MAC protocols (e.g. CSMA)
Topology	Based on topology, one main advantage is the ability of infrastructure WLANs to provide wired network applications and services	Ad-hoc WLANs are easier to set-up and require no infrastructure

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