Mobile Networks and Protocols

Questions and Answers

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 Signup and view all the answers

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

Snooping TCP Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

What are the main entities involved in Mobile IP?

The main entities in Mobile IP are the Mobile Node, Home Agent, and Foreign Agent. Signup and view all the answers

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. Signup and view all the answers

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. Signup and view all the answers

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