{"id":778,"date":"2019-08-06T07:45:49","date_gmt":"2019-08-06T12:45:49","guid":{"rendered":"https:\/\/packitforwarding.com\/?p=778"},"modified":"2020-02-25T09:32:03","modified_gmt":"2020-02-25T15:32:03","slug":"ccna-cyberops-secops-objective-2-2","status":"publish","type":"post","link":"https:\/\/packitforwarding.com\/index.php\/2019\/08\/06\/ccna-cyberops-secops-objective-2-2\/","title":{"rendered":"CCNA CyberOps SECOPS – Objective 2.2"},"content":{"rendered":"\n

Describe the fields in these protocol headers as they relate to intrusion analysis: Ethernet frame, IPv4, IPv6, TCP, UDP, ICMP, HTTP<\/p>Implementing Cisco Cybersecurity Operations (210-255) <\/strong> <\/cite><\/blockquote>\n\n\n\n

Ethernet Frames<\/h2>\n\n\n\n

\"Ethernet<\/a>
Public Domain, Link<\/a><\/p>\n\n\n\n

The biggest thing for the Ethernet frame is to be able to identify the source and destination MAC address. Often you will be looking at packets in Wireshark which will automatically decode the frame.<\/p>\n\n\n\n

IPv4<\/h2>\n\n\n\n

\"Ipv4<\/a>
By Mro<\/a> – Own work<\/span>, CC BY-SA 3.0<\/a>, Link<\/a><\/p>\n\n\n\n

Internet Protocol version 4 (IPv4) is what most people are used to seeing currently. The key points are the Time To Live, Protocol, Source Address and Destination Address.<\/p>\n\n\n\n

IPv6<\/h2>\n\n\n\n

\"IPv6
CC BY-SA 3.0<\/a>, Link<\/a><\/p>\n\n\n\n

IPv6 is actually simpler than an IPv4 header in the basic form. It is extendable in that other headers are added using the Next Header pointer. <\/p>\n\n\n\n

TCP<\/h2>\n\n\n\n

\"TCP
By Sajidur89<\/a> – Own work<\/span>, CC BY-SA 3.0<\/a>, Link<\/a><\/p>\n\n\n\n

TCP headers are useful in tracking packets to make sure that protocols are behaving the way they are supposed to be behaving. One thing that comes into play is the analysis of the sequence number, ack number and the flags in the 8 bits after the TCP Header Length. It is important to know how the TCP three-way handshake works. First, a packet is sent from the client to the server with the SYN flag. Then the server responds with a packet with the SYN and ACK flags set. The ACK acknowledges the initial SYN. Finally, the client responds with an ACK to acknowledge the server’s SYN.<\/p>\n\n\n\n

<\/a>
By Fleshgrinder<\/a> and The People<\/a> from The Tango! Desktop Project. – Own work<\/span>\nTango! Desktop Project Network Server<\/a>\nTango! Desktop Project Computer<\/a>, Public Domain, Link<\/a><\/p>\n\n\n\n

UDP<\/h2>\n\n\n\n


By MichelBakni<\/a> – Own work<\/span>, CC BY-SA 4.0<\/a>, Link<\/a><\/p>\n\n\n\n

UDP headers are quite simple with just the source and destination port, length and a checksum.<\/p>\n\n\n\n

ICMP<\/h2>\n\n\n\n

ICMP (Internet Control Message Protocol) is commonly held synonymously with the ping utility, but it does more than just that. Ping is done with echo and echo-reply packets. Destination unreachable messages can report back to ping or traceroute that a host is unavailable or unreachable.<\/p>\n\n\n\n


By Austinvernsonger<\/a> – Own work<\/span>, CC BY-SA 4.0<\/a>, Link<\/a><\/p>\n\n\n\n

HTTP<\/h2>\n\n\n\n

HTTP headers contain a lot of useful information to security analysts. Wireshark dissects these and makes them easier to understand. A good reference is the Wikipedia guide<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Describe the fields in these protocol headers as they relate to intrusion analysis: Ethernet frame, IPv4, IPv6, TCP, UDP, ICMP, HTTP Implementing Cisco Cybersecurity Operations (210-255) Ethernet Frames Public Domain, Link The biggest thing for the Ethernet frame is to be able to identify the source and destination MAC address. Often you will be looking […]<\/p>\n","protected":false},"author":1,"featured_media":651,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"CCNA CyberOps SECOPS - Objective 2.2 #ciscocert #ccnacyberops #ciscochampions","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[88,105,31,24],"tags":[107,90,106,149],"class_list":["post-778","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-ccna-cyberops","category-certification","category-cisco","tag-ccna-cyberops","tag-certification","tag-cisco","tag-cisco-certified-cyber-ops-associate"],"yoast_head":"\nCCNA CyberOps SECOPS - Objective 2.2 -<\/title>\n<meta name=\"description\" content=\"Analysis of headers at multiple OSI layers is an important skill for cybersecurity analysts. 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The Wireshark website has dozens\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/08\/pcap-3.png?fit=1030%2C422&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/08\/pcap-3.png?fit=1030%2C422&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/08\/pcap-3.png?fit=1030%2C422&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/08\/pcap-3.png?fit=1030%2C422&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":758,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/08\/04\/ccna-cyberops-secops-objective-1-8\/","url_meta":{"origin":778,"position":1},"title":"CCNA CyberOps SECOPS – Objective 1.8","author":"Ben Story","date":"August 4, 2019","format":false,"excerpt":"Describe the role of attribution in an investigation Implementing Cisco Cybersecurity Operations (210-255) Assets: Any data, device or other aspects of the environment that supports information systems.Threat Actor: The person or group responsible for an attack on an asset.","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/09\/pexels-photo-373543.jpeg?fit=640%2C426&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/09\/pexels-photo-373543.jpeg?fit=640%2C426&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/09\/pexels-photo-373543.jpeg?fit=640%2C426&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":463,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/02\/28\/cisco-certified-network-associate-cyberops\/","url_meta":{"origin":778,"position":2},"title":"Cisco Certified Network Associate – CyberOps","author":"Ben Story","date":"February 28, 2019","format":false,"excerpt":"Cisco's cybersecurity certification is the CCNA CyberOps. The certification is composed of two exams. The first exam is 210-250 SECFND: Understanding Cisco Cybersecurity Fundamentals. This exam sets the foundation for an engineer to understand the terminology and tools used by a Security Operations Center(SOC) engineer. The second half of the\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":819,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/08\/11\/ccna-cyberops-secops-objective-2-8\/","url_meta":{"origin":778,"position":3},"title":"CCNA CyberOps SECOPS – Objective 2.8","author":"Ben Story","date":"August 11, 2019","format":false,"excerpt":"Compare and contrast impact and no impact for these items: False Positive, False Negative, True Positive, True NegativeImplementing Cisco Cybersecurity Operations (210-255) Security analysts must work to minimize both false positives and false negatives. False positives take up time to determine that the detection is not a problem. False negatives\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/09\/teddy-teddy-bear-association-ill-42230.jpeg?fit=640%2C518&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/09\/teddy-teddy-bear-association-ill-42230.jpeg?fit=640%2C518&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/09\/teddy-teddy-bear-association-ill-42230.jpeg?fit=640%2C518&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":823,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/08\/11\/ccna-cyberops-secops-objective-2-9\/","url_meta":{"origin":778,"position":4},"title":"CCNA CyberOps SECOPS – Objective 2.9","author":"Ben Story","date":"August 11, 2019","format":false,"excerpt":"Interpret a provided intrusion event and host profile to calculate the impact flag generated by Firepower Management Center (FMC) Implementing Cisco Cybersecurity Operations (210-255) FMC Incident FMC Host Profile The firepower management console (FMC) presents information about the incidents and hosts. Impact flag 1 indicates an incident against a host\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/06\/abstract-business-code-270348.jpg?fit=1200%2C645&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/06\/abstract-business-code-270348.jpg?fit=1200%2C645&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/06\/abstract-business-code-270348.jpg?fit=1200%2C645&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/06\/abstract-business-code-270348.jpg?fit=1200%2C645&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2018\/06\/abstract-business-code-270348.jpg?fit=1200%2C645&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":488,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/03\/05\/ccna-cyberops-secfnd-objective-2-2\/","url_meta":{"origin":778,"position":5},"title":"CCNA CyberOps SECFND Objective 2.2","author":"Ben Story","date":"March 5, 2019","format":false,"excerpt":"Compare and contrast these concepts: Risk, Threat, Vulnerability, and Exploit.Understanding Cisco Cybersecurity Fundamentals (210-250) Risk: the possibility that something bad will happenThreat: any potential danger to a security assetVulnerability: exploitable weakness in a system or designExploit: software or commands that take advantage of a vulnerability Risk is the possibility of\u2026","rel":"","context":"In "Blog"","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/roulette-roulette-wheel-ball-turn.jpg?fit=640%2C426&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/roulette-roulette-wheel-ball-turn.jpg?fit=640%2C426&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/03\/roulette-roulette-wheel-ball-turn.jpg?fit=640%2C426&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts\/778","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/comments?post=778"}],"version-history":[{"count":1,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts\/778\/revisions"}],"predecessor-version":[{"id":1098,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/posts\/778\/revisions\/1098"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/media\/651"}],"wp:attachment":[{"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/media?parent=778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/categories?post=778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/packitforwarding.com\/index.php\/wp-json\/wp\/v2\/tags?post=778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}