4.3-4c. IPv4/IPv6 co-existence: tunneling (c). 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)BCIPv6/v4 IPv4(b)At point (c), the source IP address version is:At point (c), the source IP address is that ofhost:DIPv4Perform the matching below to indicate the datagram field value and type at point (c).At point (c), the destination IP address is thatof host:At point (c), the number of bits in thedestination IP address is:IPv6/v4 IPv6(c)[Choose ]E[Choose ][Choose ][Choose ]

IPv4/IPv6 tunneling is a technique for encapsulating IPv6 packets within IPv4 packets so that they…

4.3-4c. IPv4/IPv6 co-existence: tunneling (c). 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) B IPv6/v4 IPv4 (b) At point (c), the source IP address version is: At point (c), the source IP address is that of host: D IPv4 Perform the matching below to indicate the datagram field value and type at point (c). At point (c), the destination IP address is that of host: At point (c), the number of bits in the destination IP address is: E IPv6/v4 IPv6 (c) [Choose ] [Choose ] [Choose ] [Choose ]

4.3-4c. IPv4/IPv6 co-existence: tunneling (c). 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) B IPv6/v4 IPv4 (b) At point (c), the source IP address version is: At point (c), the source IP address is that of host: D IPv4 Perform the matching below to indicate the datagram field value and type at point (c). At point (c), the destination IP address is that of host: At point (c), the number of bits in the destination IP address is: E IPv6/v4 IPv6 (c) [Choose ] [Choose ] [Choose ] [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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A local area network (LAN) is desired to be set up in three different departments in an institution. The IP addresses of these subnets will be given manually in the format 192.168.n.h. Here n: represents the subnet, and h: represents the hosts (hosts) on that network. Suppose, in departments let the number of computers be 201, 308 and 65, respectively. Allocate IP addresses to these departments, determine the first and last IP addresses assigned, and create the table below. Show your work and reasoning. Do not write the answers directly in the table.
Please solve it correctly and please provide explanation of your answers. A PC and a Web Server are communicating over a TCP connection. The PC had started the three way handshake with the initial sequence number of 3069 . The Web Server's initial sequence number is 4830 . The window size of the PC is 815 bytes and the window size of the Web Server is 463 bytes. Using the third TCP handshake ack segment the PC sends the http request of the size 396 bytes to the Web Server. Then the Web Server answers with 3 segments containing the requested data. The first segment size is 42 bytes and the second segment size is 276 bytes and the third segment size is 146 bytes respectively. The PC receives all three segments within the timer. But unfortunately the second segment was corrupted. So the PC immediately sends an acknowledgement segment. Assume that the PC uses Selective Repeat/Reject ARQ. (d) What will be the window size of PC A after receiving only the first segment from webserver? (e)…
TCP / IP uses the client-server communication model, in which a user or computer (a client) receives a service (such as sending a web page) from another computer (a server) on the network. In short, the TCP / IP protocol suite is classified as stateless, which means that each client request is considered new because it has nothing to do with previous requests. Being stateless, network routes are released so that they can be used continuously. Answer the following questions briefly. How does resource reservation work in the TCP / IP model? Which TCP / IP layer is responsible to reserve resources across a network using the TCP / IP model? What protocol assigns an IP address to the client connected to the Internet? Checksum is used by various protocols on the Internet, but not at the one of TCP / IP Explain.
Please solve it correctly and please provide explanation of your answers. A PC and a Web Server are communicating over a TCP connection. The PC had started the three way handshake with the initial sequence number of 3069 . The Web Server's initial sequence number is 4830 . The window size of the PC is 815 bytes and the window size of the Web Server is 463 bytes. Using the third TCP handshake ack segment the PC sends the http request of the size 396 bytes to the Web Server. Then the Web Server answers with 3 segments containing the requested data. The first segment size is 42 bytes and the second segment size is 276 bytes and the third segment size is 146 bytes respectively. The PC receives all three segments within the timer. But unfortunately the second segment was corrupted. So the PC immediately sends an acknowledgement segment. Assume that the PC uses Selective Repeat/Reject ARQ. (a) What will be the sequence number of the third TCP handshake signal send from PC to webserver?…
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts over Transmission Control Protocol (TCP). A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. Suppose you wish to build a packet filter rule set allowing inbound and outbound SMTP traffic. You generate the following rule set: Rule Direction Src Addr Dest Addr Protocol Dest Port Action A In External Internal TCP 25 Permit B Out Internal External TCP > 1023 Permit C Out Internal External TCP 25 Permit D In External Internal TCP > 1023 Permit E Either Any Any Any Any Deny Describe the effect of each rule.
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts over Transmission Control Protocol (TCP). A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. Suppose you wish to build a packet filter rule set allowing inbound and outbound SMTP traffic. You generate the following rule set: Rule Direction Src Addr Dest Addr Protocol Dest Port Action A B C D E In Out Out In Either External Internal Internal External Internal External Any External Internal Any TCP TCP TCP TCP Any 25 > 1023 25 > 1023 Permit Permit Permit Permit Any Deny Someone from the outside world (10.1.2.3) attempts to open a connection from port 5150 on a remote host to the Web proxy server on port 8080 on one of your local hosts (172.16.3.4), in order to carry out an attack. Typical packets are as follows: Scenario Direction 3 4 In…
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts over Transmission Control Protocol (TCP). A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. Suppose you wish to build a packet filter rule set allowing inbound and outbound SMTP traffic. You generate the following rule set: Rule Direction Src Addr Dest Addr Protocol Dest Port Action A B C D E In Out Out In Either External Internal Internal External Internal External External Internal Any Any a. Describe the effect of each rule. TCP TCP TCP TCP Any 25 > 1023 25 > 1023 Permit Permit Permit Permit Any Deny A
Life time of a TCP segment is defined as the time for which a TCP segment is permitted to stay in a network. Consider a TCP connection has Bandwidth of 8 GBPS and lifetime of a TCP segment is 4 seconds. The number of extra bits required from options field if the user doesn't want to decrease the Bandwidth?
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts over Transmission Control Protocol (TCP). A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. Suppose you wish to build a packet filter rule set allowing inbound and outbound SMTP traffic. You generate the following rule set: Rule Direction Src Addr Dest Addr Protocol Dest Port Action A B с D E In Out Out Either External Internal External Internal Internal External Any External Internal Any TCP TCP TCP TCP Any 25 Permit > 1023 Permit 25 Permit > 1023 Permit Any Deny Your host in this example has IP address 172.16.1.1. Someone tries to send e- mail from a remote host with IP address 192.168.3.4. If successful, this will generate an SMTP dialogue, consisting of SMTP commands and mail, between the remote user and the SMTP server on your host.…
Consider the following Encrypted Key Exchange (EKE) protocol where A and B share a common password P, Ep denotes a symmetric key encryption algorithm using P as the encryption key, and Encpk denotes a public key encryption algorithm using PK as the encryption key. Note that PK is randomly generated by A in each session. В: Ep (РК) Ep(Епсрк (К)) 1. A 2. В » A: Output : K (Session key). (1) Is this protocol secure if we replace the ephemeral PK in step 1 by a digital certificate (i.e., a PK certified by a trusted CA)? Justify your answer. (2) Does this protocol provide forward secrecy? Justify your answer.
Consider a home network connected to the Internet through a single home router that supports the Network Address Translation (NAT) protocol. The ISP is only providing a single public IP address to the owner of this network (82.7.30.73). Let us assume that one of the connected home devices with IP address 192.168.0.1 has an open connection from source port 30000 to a web server with IP address 172.217.169.4. The source IP and port of the incoming TCP segments that the web server sees could be: 192.168.0.1, 30000 82.7.30.73, 5555 192.168.0.1, 5555 172.217.169.4, 80
Registration Number: 193046 Consider a network with 3 hosts and a NAT router. Suppose that the network address of the home network is 192.168.NNN/24, where NNN are the last 3 digits of your Reg#. For example, if your Reg# is BSE193046, NNN = 046 and therefore the network address wil be 192168.46/24. (If NNN>255, consider NNN=254) (a) Assign any public IP address to NAT router’s outgoing interface. (b) Assign IP addresses to all 3 hosts and local interface of the NAT router in the home network. (