Being a Network Engineer that is called to locate an intruder connection in a given Internet space. Assume that you are accessing that Internet through a connection that has the address 142.151.216.28 using a device with the MAC address AF:42:F2:15:10:83. If you knew that the connection you are using belongs to one of a 64 equal sized sub-blocks that are all belong to a Regional ISP who manages a large block of 8192 addresses. For such scenario, and assuming that whole address space is usable, please find the following: (1) In a dotted decimal notation, with the appropriate prefix length being shown, write down the first address of the sub-block from which you are connected to the Internet. Note: Please write your answer using NO spaces, in the appropriate address format, and with the CIDR notation when necessary. Answer:

Being a Network Engineer that is called to locate an intruder connection in a given Internet space. Assume that you are accessing that Internet through a connection that has the address 142.151.216.28 using a device with the MAC address AF:42:F2:15:10:83. If you knew that the connection you are using belongs to one of a 64 equal sized sub-blocks that are all belong to a Regional ISP who manages a large block of 8192 addresses. For such scenario, and assuming that whole address space is usable, please find the following: (1) In a dotted decimal notation, with the appropriate prefix length being shown, write down the first address of the sub-block from which you are connected to the Internet. Note: Please write your answer using NO spaces, in the appropriate address format, and with the CIDR notation when necessary. Answer:

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

See similar textbooks

Similar questions

If there is the requirement to create 21 sub-network in a domain whose network address is given by 192.18.2.0/16, then determine the sub-network mask and the range of address in first and last sub-networks.
A. “Security is different in wireless”1. Discuss the statement above. The answer needs to take into account allaspects of the debate. Provide example if needed.2. Support your answer with reference.B. In IEEE 802.11, open system authentication simply consists of two communications.An authentication is requested by the client, which contains the station ID (typicallythe MAC address). This is followed by an authentication response from the AP/routercontaining a success or failure message. An example of when a failure may occur isif the client’s MAC address is explicitly excluded in the AP/router configuration.1. What are the benefits of this authentication scheme? 2. What are the security vulnerabilities of this authentication scheme?C. Twitter and Facebook are one of the well-known stay-up-to-date media. Whether youuse it to keep up with news or just to share your thoughts, it’s one of the commonlyused services on the Internet. Therefore, use Wireshark to:1. Capture and analyse Twitter…
Computer Science Suppose KDC X serves one community of users and KDC Y serves a different community of users. KDC X and KDC Y have an established shared symmetric key KXY. Develop the steps of communication needed to enable customer A of KDC X community, to obtain a shared session key with customer B of KDC Y community. KDC X shares a symmetric key with A, KAX, and KDC Y shares a symmetric key with B, KBY. At the end of the steps of communication A and B will have established a session key, KAB.
Suppose within your web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that three DNS servers are visited before your host receives the IP address from DNS. The first DNS server visited is the local DNS cache, with an RTT delay of RTT = 4 msecs. The second and third DNS servers contacted have RTTs of 45 and 24 msecs, respectively. Initially, let's suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP = 9 msecs. Assuming zero transmission time for the HTML object, how much time elapses from when the client clicks on the link until the client receives the object? (Do not forget the TCP handshake(s).) 82 msecs O 91 msecs O 46 msecs O 67 msecs
CSM Tech Publishing has expanded its network from one subnet to two subnets and is putting 200 computers on the new subnet with plans for adding up to 100 more computers over the next few years. Currently, it's using DHCP for the existing subnet and has a scope configured with start address 172.16.1.1 and end address 172.16.1.200 with a prefix length of 24. The DHCP server is in the main distribution facility where the router is placed to route between the subnets. The current DHCP server runs Windows Server 2016, is performing well, and has plenty of unused computing resources (CPU, memory, and so forth). You need to configure DHCP for the new subnet at the lowest cost possible. Propose a DHCP configuration, the scope's start and end addresses, and the prefix length for the new subnet.
Which of the following instructions falls in the category of data transfer instructions? JUMP LOAD ROTATE AND
The maximum value of a TTL for a DNS resource record (RR) is 2147483647 seconds. What is the primary drawback of using this TTL? а. This TTL is approximately equal to 68 years. Once local DNS servers receive this TTL, any changes made to the name-to-IP-address mapping by a DNS administrator will not be seen by clients whose local DNS server has cached this RR. O b. There aren't enough bits in the DNS RR to represent a TTL this large. A TTL this long would cause too many DNS servers to cache this RR. с. O d. A TTL of this size would cause too many queries to go to the root servers.
In this programming assignment, you will implement a decentralized peer-to-peer network architec-ture (P2P), including the basic implementation of the BitTorrent protocol (BTP). General P2P architec-tures can be classified into centralized and decentralized, In P2P centralized architectures, new peers senda request to the Traker (normally done via HTTP) requesting a list containing all the IP addresses ofthe peers that are already connected to the P2P network sharing the same file. The tracker then, replieswith a response containing such list. In P2P decentralized architecture, each peer is also a Traker, and itcan share only limited resources because it only sees the partial network. On the other hand, P2P decen-tralized networks avoid single point of failure since they do not depend of centralized trackers. Examplesof P2P applications that are/were implementing centralizing architectures are Nasper, the Berkeley OpenNetwork Infrastructure (BOINC) and some versions of BitTorrent.…
In this question, you will help Mallory develop new ways to conduct denial-of-service (DoS) attacks. (1) CHARGEN and ECHO are services provided by some UNIX servers. For every UDP packet arriving at port 19, CHARGEN sends back a packet with 0 to 512 random characters. For every UDP packet arriving at port 7, ECHO sends back a packet with the same content. Mallory wants to perform a DoS attack on two servers. One with IP address M supports CHARGEN, and another with IP address N supports ECHO. Mallory can spoof IP addresses. Is it possible to create a single UDP packet with no content which will cause both servers to consume a large amount of bandwidth? If yes, describe the header (i.e., source IP, destination IP, source port, and destination port) of your UDP package; otherwise, explain why? Assume now that CHARGEN and ECHO are now modified to only respond to TCP packets (post-handshake) and not UDP. Is it possible to create a single TCP SYN packet with no content which will cause…
7.1 In IEEE 802.11, open system authentication is accomplished via a simple two-way communication. The client requests authentication, which includes the station ID, which is provided by the server (typically the MAC address). A successful or unsuccessful authentication response from the AP/router is received in response to the previous request from the client. For instance, if the client's MAC address has been expressly omitted from the AP/router setup, a failure may occur.a. What are the advantages of using this kind of authentication scheme?b. What are the security flaws in this authentication method and how may they be mitigated?
Host A sends the information of size 3000 bytes to Host B using TCP protocol. As long as Host B receives each packet in size 1000 bytes, Host B must acknowledge Host A. We assume the header size in each packet is 40 bytes, the starting sequence number used by Host A is 1000, and the window size of the sender side is 3000 bytes. What is the value of SND.UNA when the first packet is sent out, but not acknowledged? Question 11 options: 1000 2000 1999 0
An organization is granted a block of addresses with the beginning address 14.72.128.0/23. The organization needs to have 3 subblocks of addresses to use in its three subnets as shown below: a.One subblock of 50 addresses. b.One subblock of 220 addresses. c.One subblock of 120 addresses. Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.