4.3-4a. IPv4/IPv6 co-existence: tunneling (a). Consider the mixed IPv4/IPv6 network shown below,where an IPv4 tunnel exists between IPv6 routers B and E. Suppose that IPv6 router A sends adatagram to IPv6 router F. IPv6 datagrams are shown in blue; the IPv4 datagram is in red (containingthe encapsulated IPv6 datagram in blue).AIPv6(a)BIPv6/v4CIPv4(b)At point (a), the IP version field in thedatagram is:At point (a), the source IP address is that ofhost:DIPv4At point (a), the destination IP address is thatof host:At point (a), the number of bits in thedestination IP address is:Perform the matching below to indicate the datagram field value and type at point (a).FABE[Choose ][Choose ]BDIPv6/v4(c)IPv4IPv612832IPv6[Choose ]

IPv4/IPv6 co-existence through tunneling is a mechanism designed to facilitate the smooth integration of IPv6 into existing IPv4 networks. As the world transitions from IPv4 to IPv6 due to the exhaustion of IPv4 addresses, there arises a need for interoperability between the two protocols during the transition period. Tunneling is one of the techniques employed to achieve this co-existence.In the context of tunneling, IPv6 datagrams are encapsulated within IPv4 packets, allowing them to traverse IPv4 networks seamlessly. This process involves routers that support both IPv4 and IPv6, creating tunnels between them to encapsulate IPv6 traffic within IPv4 packets. In a typical setup, an IPv6 router encapsulates an IPv6 datagram within an IPv4 packet, transmitting it across an IPv4 network. At the receiving end, another IPv6 router decapsulates the packet, extracting the original IPv6 datagram.Let's analyze the given scenario and answer the questions step by step:Given Information:IPv4/IPv6 co-existence network.IPv4 tunnel between IPv6 routers B and E.IPv6 datagrams are shown in blue, and the IPv4 datagram is in red.Analysis:(a) IP Version Field in the Datagram:The datagram at point (a) is going from IPv6 router A to IPv6 router F.Therefore, the IP version field should indicate IPv6.Correct Selection: IPv6(b) Source IP Address at Point (a):The datagram originates from IPv6 router A.Correct Selection: A(c) Destination IP Address at Point (a):The datagram is heading to IPv6 router F.Correct Selection: F(d) Number of Bits in the Destination IP Address at Point (a):In IPv6, the standard length of an IP address is 128 bits.Correct Selection: 128Conclusion:At point (a), the IP version field in the datagram is IPv6.The source IP address is that of host A.The destination IP address is that of host F.The number of bits in the destination IP address is 128.These selections are based on the analysis of the given network scenario, considering the types of routers involved and the color-coded datagrams.

Engineering

Computer Science

4.3-4a. IPv4/IPv6 co-existence: tunneling (a). Consider the mixed IPv4/IPv6 network shown below, where an IPv4 tunnel exists between IPv6 routers B and E. Suppose that IPv6 router A sends a datagram to IPv6 router F. IPv6 datagrams are shown in blue; the IPv4 datagram is in red (containing the encapsulated IPv6 datagram in blue). IPv6 (a) с *** IPv4 (b) B IPv6/v4 At point (a), the IP version field in the datagram is: Perform the matching below to indicate the datagram field value and type at point (a). At point (a), the source IP address is that of host: IPv4 IPv6/v4 IPv6 (c) At point (a), the destination IP address is that of host: At point (a), the number of bits in the destination IP address is: E [Choose ] [Choose ] F A >> B D IPv4 IPv6 128 32 [Choose ]

4.3-4a. IPv4/IPv6 co-existence: tunneling (a). Consider the mixed IPv4/IPv6 network shown below, where an IPv4 tunnel exists between IPv6 routers B and E. Suppose that IPv6 router A sends a datagram to IPv6 router F. IPv6 datagrams are shown in blue; the IPv4 datagram is in red (containing the encapsulated IPv6 datagram in blue). IPv6 (a) с *** IPv4 (b) B IPv6/v4 At point (a), the IP version field in the datagram is: Perform the matching below to indicate the datagram field value and type at point (a). At point (a), the source IP address is that of host: IPv4 IPv6/v4 IPv6 (c) At point (a), the destination IP address is that of host: At point (a), the number of bits in the destination IP address is: E [Choose ] [Choose ] F A >> B D IPv4 IPv6 128 32 [Choose ]

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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4.3-4a. IPv4/IPv6 co-existence: tunneling (a). Consider the mixed IPv4/IPv6 network shown b where an IPv4 tunnel exists between IPv6 routers B and E. Suppose that IPv6 router A sends a datagram to IPv6 router F. IPv6 datagrams are shown in blue; the IPv4 datagram is in red (cont. the encapsulated IPv6 datagram in blue). A IPv6 (a) B IPv6/v4 IPv4 (b) At point (a), the IP version field in the datagram is: At point (a), the source IP address is that of host: D IPv4 Perform the matching below to indicate the datagram field value and type at point (a). At point (a), the destination IP address is that of host: At point (a), the number of bits in the destination IP address is: E IPv6/v4 IPv6 (c) [Choose ] [Choose ] [Choose ] [Choose ]
computer networking
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