[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-573663-105":53,"doc-detail-573663-en":126},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":119,"head_meta":121,"extra_data":123,"updated_unix":125},105,"en","cissp-cheat-sheet-domain-4-network-and-communication-security","CISSP Cheat Sheet - Domain 4 - Network and Communication Security","","Domain 4: Network and Communication Security covers core networking and security concepts needed for CISSP. It summarizes the OSI reference model, including the seven layers and the CIA/AU/N security mapping, and provides OSI mnemonic support. It also compares TCP/IP layers with example protocols, explains TCP 3-way handshake, and outlines common LAN topologies and packet transmission types. Additional coverage includes DSL types, LAN/WAN media, LAN switching/VLANs, and NAT/PAT deployment concepts.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/cissp-cheat-sheet-domain-4-network-and-communication-security/573663/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/cissp-cheat-sheet-domain-4-network-and-communication-security/573663.png","ImageObject",442,249,{"name":88,"@type":89},"lilac","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-16","2026-10-14",true,{"@type":98,"interactionType":99,"userInteractionCount":9},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"How do the OSI layers map to security concepts in this cheat sheet?","Question",{"text":108,"@type":109},"It links each layer to confidentiality, authentication, integrity, and non-repudiation using C, AU, I, and N. For example, Application includes C, I, AU, and N, while Physical emphasizes C.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"What is the difference between CSMA/CD and CSMA/CA?",{"text":113,"@type":109},"CSMA/CD stops transmission when a collision is detected and is associated with Ethernet. CSMA/CA pauses on detecting a busy channel and retransmits after a random delay to reduce simultaneous resends.",{"name":115,"@type":106,"acceptedAnswer":116},"What roles do NAT and PAT play in secure network design?",{"text":117,"@type":109},"NAT hides internal public IP addresses from external internet access. PAT allows multiple internal devices or applications to share a single public IP address assigned by the ISP.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},573663,1792171161,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":9,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":9,"language":135,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":136,"faqs":137,"seo_title":138,"seo_description":61,"update_tm":139,"read_time":4},3985747861865,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Domain 4: Network and Communication Security  \n\n| OSI Reference Model |  |  |\n| --- | --- | --- |\n| 7 layers, Allow changes between layers, Standard hardware/software interoperability. |  |  |\n| Tip, OSI Mnemonics\u003Cbr>All People Seem To Need Data Processing\u003Cbr>Please Do Not Throw Sausage Pizza Away |  |  |\n| Layer | Data | Security |\n| Application | Data | C, I, AU, N |\n| Presentation | Data | C, AU, Encryption |\n| Session | Data | N |\n| Transport | Segment | C, AU, I |\n| Network | Packets | C, AU, I |\n| Data link | Frames | C |\n| Physical | Bits | C |\n| C=Confidentiality, AU=Authentication, I=Integrity, N=Non repudiation |  |  |\n\n\n| Layer (No) | Functions | Protocols | Hardware /\u003Cbr>Formats |\n| --- | --- | --- | --- |\n| Physical (1) | Electrical signal Bits to voltage |  | Cables, HUB, USB, DSL Repeaters, ATM |\n| Data Link\u003Cbr>Layer (2) | Frames setup\u003Cbr>Error detection and control Check integrity of packets Destination address, Frames use in MAC to IP address conversion. | PPP-PPTP-L2TP- -ARPRARP-SNAP-CHAP-LCPMLP-Frame Relay-HDLCISL-MAC-Ethernet-Token Ring-FDDI | Layer 2\u003Cbr>Switch\u003Cbr>bridges |\n| Network\u003Cbr>layer | Routing, Layer 3 switching, segmentation, logical addressing. ATM. Packets. | ICMP-BGP-OSPF-RIP- IPBOOTP-DHCP- ICMP | Layer 3\u003Cbr>Switch\u003Cbr>Router |\n| Transport | Segment-Connection oriented | TCP-UDP datagrams. Reliable end to end data transfer\u003Cbr>Segmentation-sequencingand error checking | RoutersVPN concentrato\u003Cbr>rs-Gateway |\n| Session\u003Cbr>Layer | Data, simplex, half duplex, full dupl Eg. peer connections. | TCP-UDP-NSF-SQLRADIUS-and RPC-PPTPPPP | Gateways |\n| Presentation layer | Data\u003Cbr>compression/decompression and encryption/decryption | TCP-UDP messages | Gateways JPEG-TIFF\u003Cbr>MID-HTML |\n| Application\u003Cbr>layer | Data | TCP-UDP-FTP-TELNETTFTP-SMTP-[HTTP CDP](HTTP CDP)SMB-SNMP-NNTP-SSL[HTTP/](HTTP/) [HTTPS](HTTPS). | Gateways |\n\n\n| TCP/IP Model |  |  |\n| --- | --- | --- |\n| Layers | Action | Example Protocols |\n| Network access | Data transfer done at this layer | Token ring • Frame Relay • FDDI\u003Cbr>• Ethernet • X.25 |\n| Internet | Create small data chunks called datagrams to be transferred via network access layer | IP • RARP • ARP • IGMP • ICMP |\n| Transport | Flow control and integrity | TCP • UDP |\n| Application | Convert data into readable format | Telnet • SSH • DNS • [HTTP](HTTP) • FTP\u003Cbr>• SNMP • DHCP |\n\n\n| TCP 3-way Handshake |\n| --- |\n| SYN-SYN/ACK-ACK |\n\n\n| LAN Topologies |  |  |\n| --- | --- | --- |\n| Topology | Pros | Cons |\n| BUS | • Simple to setup | • No redundancy\u003Cbr>• Single point of failure\u003Cbr>• Difficult to troubleshoot |\n| RING | • Fault tolerance | • No middle point |\n| Start | • Fault tolerance | • Single point of failure |\n| Mesh | • Fault tolerance | • Redundant\u003Cbr>• Expensive to setup |\n\n\n| Types of Digital Subscriber Lines (DSL) |  |\n| --- | --- |\n| Asymmetric Digital Subscriber Line (ADSL) | • Download speed higher than upload\u003Cbr>• Maximum 5500 meters distance via telephone lines.\u003Cbr>• Maximum download 8Mbps, upload 800Kbps. |\n| Rate Adaptive DSL\u003Cbr>(RADSL) | • Upload speed adjust based on quality of the transmission line\u003Cbr>• Maximum 7Mbps download, 1Mbps upload over 5500 meters. |\n| Symmetric Digital Subscriber Line (SDSL) | • Same rate for upstream and downstream transmission rates.\u003Cbr>• Distance 6700 meters via copper telephone cables\u003Cbr>• Maximum 2.3Mbps download, 2.3Mbps upload. |\n| Very-high-bit-rate DSL\u003Cbr>(VDSL) | • Higher speeds than standard ADSL\u003Cbr>• Maximum 52Mbps download, 16 Mbps upload up to 1200 Meters |\n| High-bit-rate DSL\u003Cbr>(HDSL) | T1 speed for two copper cables for 3650 meters |\n| Committed Information Rate (CIR) | Minimum guaranteed bandwidth provided by service provider. |\n\n\n| LAN Packet Transmission |  |\n| --- | --- |\n| Unicast | Single source send to single destination |\n| Multicast | Single source send to multiple destinations |\n| Broadcast | Source packet send to all the destinations. |\n| Carrier-sense Multiple Access (CSMA) | One workstations retransmits frames","cbCaiaZNG9qjHmh6","https://ap.wps.com/l/cbCaiaZNG9qjHmh6","pdf",62018,"English","# OSI Reference Model\n## Tip and OSI mnemonics\n## Layer security mapping (C, AU, I, N)\n# Layer Functions, Protocols, and Hardware\n# TCP/IP Model\n# TCP 3-way Handshake\n# LAN Topologies\n# DSL Types\n# LAN Packet Transmission\n## Unicast, Multicast, Broadcast\n## CSMA/CD and CSMA/CA\n## Polling and Token passing\n# LAN/WAN Media\n# Secure Network Design Components (NAT/PAT)","[{\"question\":\"How do the OSI layers map to security concepts in this cheat sheet?\",\"answer\":\"It links each layer to confidentiality, authentication, integrity, and non-repudiation using C, AU, I, and N. For example, Application includes C, I, AU, and N, while Physical emphasizes C.\"},{\"question\":\"What is the difference between CSMA/CD and CSMA/CA?\",\"answer\":\"CSMA/CD stops transmission when a collision is detected and is associated with Ethernet. CSMA/CA pauses on detecting a busy channel and retransmits after a random delay to reduce simultaneous resends.\"},{\"question\":\"What roles do NAT and PAT play in secure network design?\",\"answer\":\"NAT hides internal public IP addresses from external internet access. PAT allows multiple internal devices or applications to share a single public IP address assigned by the ISP.\"}]","CISSP Cheat Sheet - Domain 4 - Network and Communication Security | PDF",1791943965]