Table 1 Comparison of fog and cloud features [39]

Latency

Low (locality)

High (eventual consistency)

Explicit mobility

Yes

N/A

Architecture

Decentralisation

Centralisation

Service access

At the edge/on handhold device

Through core

Local awareness

Yes

N/A

Geographic distribution

Yes

N/A

Scalability

High

Average

Availability

High

High

Number of users/devices

Tens of billions

Tens/hundreds of millions

Content generation

Anywhere

Central location

Content consumption

Anywhere

End devices

Software virtualisation

User devices/network equipment

Central corporate facilities