{"id":256791,"date":"2026-07-13T15:03:54","date_gmt":"2026-07-13T12:03:54","guid":{"rendered":"https:\/\/1kitap1.com\/en\/comptia-security-guide-to-network-security-fundamentals-8th-edition-mark-ciampa\/"},"modified":"2026-07-13T15:03:54","modified_gmt":"2026-07-13T12:03:54","slug":"comptia-security-guide-to-network-security-fundamentals-8th-edition-mark-ciampa","status":"publish","type":"post","link":"https:\/\/1kitap1.com\/en\/comptia-security-guide-to-network-security-fundamentals-8th-edition-mark-ciampa\/","title":{"rendered":"CompTIA Security Guide To Network Security Fundamentals 8th Edition – Mark Ciampa"},"content":{"rendered":"
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The answer may be a network that is out of this world. The computer network found on modern spacecraft would likely be one of the most critical computer networks because there is virtually no room for error: if something happens so that the network does not properly function, it would likely mean a catastrophe for the spacecraft and the astronauts on board.<\/p>\n

This is the reason a vulnerability recently found on the network used in modern spacecrafts has been the cause for alarm. For many years, spacecraft had multiple computer networks installed. One network was used to transmit safety- critical and mission-critical instructions, such as transmitting steering and engine control messages to the various flight systems. On these computer networks, messages were sent and received at intervals as short as 40\u201350 milliseconds (ms).<\/p>\n

This fast speed was essential because a single delayed or dropped message could result in serious problems. The other spacecraft networks carried less critical traffic such as videoconferencing data. Segregating functions among different networks helps to ensure that critical messages were delivered in a timely fashion. However, having multiple computer networks added additional weight, took up valuable storage space, consumed power, and increased costs on the space- craft. But each of these four elements\u2014weight, space, power, and cost\u2014need to be kept to a minimum in outer space.<\/p>\n

Modern spacecraft have moved away from multiple segregated computer networks. Instead, they use a single time-triggered Ethernet (TTE) network. Ethernet has been a standard for local area networks (LANs) since the 1980s, and TTE is built on it. TTE, first tested on a spacecraft in 2014, is called a mixed-criticality network.<\/p>\n

This single network is capable of routing traffic that has different levels of importance. TTE provides two key benefits not available in regular Ethernet. First, it supports a \u201ctime-triggered paradigm\u201d where all devices are tightly synchronized. They send messages at a predetermined schedule to reduce the time it takes data to move from one point to another (latency) down to hundreds of microseconds (\u03bcs). The second feature is fault toler- ance. TTE replicates the entire network into multiple planes and forwards messages across all planes simultaneously for redundancy (most spacecraft have three planes).<\/p>\n

However, in late 2022, security researchers published a study that demonstrated they were able to break TTE\u2019s isolation guarantees. They called their attack \u201cPCspooF\u201d because it injects program control frames (PCFs) into the TTE network. PCspooF is an attack that allows a noncritical device connected to a single plane to disrupt synchronization #TrendingCyber Copyright 2025 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and\/or eChapter(s).<\/p>\n

Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.<\/p>\n

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Australia \u2022 Brazil \u2022 Canada \u2022 Mexico \u2022 Singapore \u2022 United Kingdom \u2022 United States Copyright 2025 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and\/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.<\/p>\n

This is an electronic version of the print textbook. Due to electronic rights restrictions, some third party content may be suppressed. Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. The publisher reserves the right to remove content from this title at any time if subsequent rights restrictions require it. For valuable information on pricing, previous editions, changes to current editions, and alternate formats, please visit www.cengage.com\/highered to search by ISBN#, author, title, or keyword for materials in your areas of interest.<\/p>\n

Important Notice: Media content referenced within the product description or the product text may not be available in the eBook version. Copyright 2025 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and\/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it.<\/p>\n

Copyright \u00a9 2025 Cengage Learning, Inc. ALL RIGHTS RESERVED. No part of this work covered by the copyright herein may be reproduced or distributed in any form or by any means, except as permitted by U.S. copyright law, without the prior written permission of the copyright owner. Unless otherwise noted, all content is Copyright \u00a9 Cengage Learning, Inc. Microsoft is a registered trademark of Microsoft Corporation in the U.S. and\/or other countries. The names of all products mentioned herein are used for identification purposes only and may be trademarks or registered trademarks of their respective owners.<\/p>\n

Cengage Learning disclaims any affiliation, association, connection with, sponsorship, or endorsement by such owners. Previous edition(s): \u00a9 2022, \u00a9 2018, \u00a9 2015 For product information and technology assistance, contact us at Cengage Customer & Sales Support, 1-800-354-9706 or support.cengage.com.<\/p>\n<\/blockquote>\n

This is a short excerpt from the opening of “” by Unknown, quoted for review and introduction purposes. All rights belong to the copyright holders.<\/em><\/p>\n

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