Introduction to security root@kali:-# nmap -pl-65535 192.168.1.127 -- open eStarting Nmap 7.60 ( https://nmap.org ) at 2017-11-24 04:45 ESTNmap scan report for 192.168.1.127Host is up (0.0020s latency).Not shown: 65522 closed portsPORT135/tcp139/tcp443/tcp445/tcp902/tcp912/tcp3389/tcp49152/tcp open49153/tcp open49154/tcp open49155/tcp open49158/tcp open49159/tcp openMAC Address: FC:AA:STATE SERVICEоpenmsrpcnetbios -ssnopenopenhttpsmicrosoft-ds ticles.iniss-realsecureоpenopenopenopenapex-meshms -wbt -serverunknownunknownunknownunknownunknownunknownE6 (Giga-byte Technology)Nmap done: 1 IP address (1 host up) scanned in 23.07 secondsI d. Explain how nmap tool can be used by both networkadministrator and hackers.

Nmap(Network mapper) Nmap is a free, open-source tool for vulnerability scanning and network…

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. Explain how nmap tool can be used by both network administrator and hackers.

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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P27. Host A and B are communicating over a TCP connection, and Host B has already received from A all bytes up through byte 126. Suppose Host A then sends two segments to Host B back-to-back. The first and second segments contain 80 and 40 bytes of data, respectively. In the first segment, the sequence number is 127, the source port number is 302, and the destination port number is 80. Host B sends an acknowledgment whenever it receives a segment from Host A. In the second segment sent from Host A to B, what are the sequence number, source port number, and destination port number? If the first segment arrives before the second segment, in the acknowledgment of the first arriving segment, what is the acknowledgment number, the source port number, and the destination port number? If the second segment arrives before the first segment, in the acknowledgment of the first arriving segment, what is the acknowledgment number? Suppose the two segments sent by A arrive in order at B.…
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Below are the two questions, so make sure to answer each part carefully: Why does TCP implement congestion control if it already has flow control to manage the sender's window? Consider our recent reading [Chiu+89] Analysis of the Increase and Decrease algorithms for congestion avoidance in computer networks. How does this article showcases that TCP is fair?