Mobile Networks and Protocols
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Questions and Answers

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

  • Reducing hardware costs
  • Ensuring seamless mobility across different networks (correct)
  • Enhancing local network speeds
  • Increasing battery life of mobile devices
  • What is the purpose of Agent Advertisement in Mobile Network Layer?

  • To advertise data transfer rates
  • To facilitate network discovery and registration (correct)
  • To broadcast security alerts
  • To announce new software updates
  • Which type of routing is used in Mobile Adhoc Networks that incorporates a route updating mechanism to ensure freshness?

  • Destination Sequence Distance Vector (correct)
  • Performance Metrics-based Routing
  • Hierarchical algorithms
  • Dynamic Source Routing
  • Which version of TCP is tailored specifically for handling interruptions in mobile networks by splitting the end-to-end connection?

    <p>Indirect TCP</p> Signup and view all the answers

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

    <p>Snooping TCP</p> Signup and view all the answers

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

    <p>To ensure that packets are properly delivered to the mobile node by encapsulating them within another packet that can travel through a tunnel.</p> Signup and view all the answers

    Explain the concept of reserve tunneling in Mobile IP.

    <p>Reserve tunneling is a process where packets are tunneled back to the mobile node's home network before being forwarded to their final destination.</p> Signup and view all the answers

    What are the main entities involved in Mobile IP?

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

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

    <p>Dynamic Source Routing allows nodes to dynamically discover a route across multiple network hops to any destination in the ad hoc network.</p> Signup and view all the answers

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

    <p>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.</p> 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

    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

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    Description

    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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