Mobile Networks and Protocols

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10 Questions

Which of the following is primarily a goal of Mobile IP?

Ensuring seamless mobility across different networks

What is the purpose of Agent Advertisement in Mobile Network Layer?

To facilitate network discovery and registration

Which type of routing is used in Mobile Adhoc Networks that incorporates a route updating mechanism to ensure freshness?

Destination Sequence Distance Vector

Which version of TCP is tailored specifically for handling interruptions in mobile networks by splitting the end-to-end connection?

Indirect TCP

In mobile transport layer, which TCP variant uses cached segments to improve performance during temporary disconnections?

Snooping TCP

What is the purpose of encapsulation in the Mobile Network Layer?

To ensure that packets are properly delivered to the mobile node by encapsulating them within another packet that can travel through a tunnel.

Explain the concept of reserve tunneling in Mobile IP.

Reserve tunneling is a process where packets are tunneled back to the mobile node's home network before being forwarded to their final destination.

What are the main entities involved in Mobile IP?

The main entities in Mobile IP are the Mobile Node, Home Agent, and Foreign Agent.

Describe the role of the Dynamic Source Routing in Mobile Adhoc Networks.

Dynamic Source Routing allows nodes to dynamically discover a route across multiple network hops to any destination in the ad hoc network.

How does Fast-retransmission TCP handle packet losses and improve performance in the Mobile Transport Layer?

Fast-retransmission TCP reduces the time a sender waits before retransmitting a lost packet by lowering the threshold for duplicate acknowledgments needed to trigger a retransmission.

Study Notes

Mobile Network Layer

  • Mobile IP aims to provide location-independent routing of IP packets to mobile devices
  • Assumptions of Mobile IP: mobile nodes change their point of attachment to the internet, mobile nodes use IP as the network layer protocol
  • Requirements of Mobile IP: mobility, transparency to applications, and scalability
  • Entities in Mobile IP: mobile nodes, home agents, foreign agents, and correspondent nodes
  • Terminology in Mobile IP: home address, care-of address, binding update
  • IP packet delivery in Mobile IP: triangular routing, tunnelling, and encapsulation
  • Agent Advertisement and Discovery in Mobile IP: allows mobile nodes to discover available agents
  • Registration in Mobile IP: mobile nodes register with a home agent and a foreign agent
  • Tunneling in Mobile IP: encapsulation of IP packets for routing
  • Encapsulation in Mobile IP: adding headers to IP packets for routing
  • Optimization in Mobile IP: reducing overhead of Mobile IP
  • Reserve Tunneling in Mobile IP: tunneling from correspondent node to mobile node
  • Security in Mobile IP: protecting against unauthorized access and use
  • IPv6 and Mobile IP: using IPv6 features for Mobile IP
  • DHCP in Mobile IP: dynamic allocation of IP addresses

Mobile Adhoc Networks

  • Routing in MANETs: finding routes between mobile nodes
  • Destination Sequence Distance Vector (DSDV) algorithm: table-driven algorithm for MANETs
  • Dynamic Source Routing (DSR) algorithm: on-demand algorithm for MANETs
  • Hierarchical algorithms for MANETs: clustering, tree-based, and mesh-based algorithms
  • Performance Metrics for MANETs: throughput, delay, packet loss, and jitter

Mobile Transport Layer

  • Traditional TCP: does not adapt well to wireless networks
  • Indirect TCP: TCP connection between mobile node and fixed host
  • Snooping TCP: sniffing and caching TCP segments to improve performance
  • Mobile TCP: TCP optimized for mobile networks
  • Fast-retransmission TCP: quick retransmission of lost packets
  • Transaction-oriented TCP: optimize for short transactions

Mobile Network Layer

  • Mobile IP aims to provide location-independent routing of IP packets to mobile devices
  • Assumptions of Mobile IP: mobile nodes change their point of attachment to the internet, mobile nodes use IP as the network layer protocol
  • Requirements of Mobile IP: mobility, transparency to applications, and scalability
  • Entities in Mobile IP: mobile nodes, home agents, foreign agents, and correspondent nodes
  • Terminology in Mobile IP: home address, care-of address, binding update
  • IP packet delivery in Mobile IP: triangular routing, tunnelling, and encapsulation
  • Agent Advertisement and Discovery in Mobile IP: allows mobile nodes to discover available agents
  • Registration in Mobile IP: mobile nodes register with a home agent and a foreign agent
  • Tunneling in Mobile IP: encapsulation of IP packets for routing
  • Encapsulation in Mobile IP: adding headers to IP packets for routing
  • Optimization in Mobile IP: reducing overhead of Mobile IP
  • Reserve Tunneling in Mobile IP: tunneling from correspondent node to mobile node
  • Security in Mobile IP: protecting against unauthorized access and use
  • IPv6 and Mobile IP: using IPv6 features for Mobile IP
  • DHCP in Mobile IP: dynamic allocation of IP addresses

Mobile Adhoc Networks

  • Routing in MANETs: finding routes between mobile nodes
  • Destination Sequence Distance Vector (DSDV) algorithm: table-driven algorithm for MANETs
  • Dynamic Source Routing (DSR) algorithm: on-demand algorithm for MANETs
  • Hierarchical algorithms for MANETs: clustering, tree-based, and mesh-based algorithms
  • Performance Metrics for MANETs: throughput, delay, packet loss, and jitter

Mobile Transport Layer

  • Traditional TCP: does not adapt well to wireless networks
  • Indirect TCP: TCP connection between mobile node and fixed host
  • Snooping TCP: sniffing and caching TCP segments to improve performance
  • Mobile TCP: TCP optimized for mobile networks
  • Fast-retransmission TCP: quick retransmission of lost packets
  • Transaction-oriented TCP: optimize for short transactions

This quiz covers mobile networks, including the network layer, adhoc networks, and transport layer protocols. Topics include mobile IP, routing, TCP variants, and more.

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