Test your basic knowledge |

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Common backdoor to open a port - port scan scans for open ports on remote host - scans 0 - 65 -535 twice. TCP and UDP






2. Provides insight into traffic on the network - help detect problems with network operations - provides auditing for other security measures






3. It interacts with the application layer to determine which network services will be required






4. flags anomalous conditions in traffic on the network - requires understanding on what is normal - bases good traffic as a baseline






5. Strips OS commands and characters from input - avoid making system calls from within the app * especially based on user input






6. Used for connecting two physical segments of a network - segments traffic - breaks up collision domains - not generally used because of switches






7. deployment challenges including topology and access limitations - analyzing encrypted traffic - quantity vs. quality of signatures - performance limitations with extensive analysis techniques - very costly for proper management






8. A TCP version of ping - sends custom TCP packets to a host and listens for replies - enables port scanning and spoofing simultaneously






9. NTP - BootP/DHCP - NFS file systems - SNMP - TFTP






10. Attacks systems through known vulnerabilities - automatically scans for more systems to attack - lowers system defenses - installs rootkit or root shell - opens up back doors - self contained malware that can copy itself






11. Attaches itself to existing program files and activated when the exe is launched






12. Unencrypted message in its original form






13. Netmasks or subnets provide a method for identifying what portion of an address is the network - and what portion is the host






14. Small program triggered by an event that provides an action. E.g. scheduled file removal if countdown isn't reset - ie: employee was fired






15. An attacker recruits zombie systems ahead of time to simultaneously release a flood of traffic at a specific target.






16. Switches networks make it difficult to monitor traffic in promiscuous mode - topology must be able to support traffic aggregation for monitoring






17. Unified data carrying service - replacing from replay and ATM






18. Network traffic to the host - typically listens on all interface - uses signature analysis to identify events of interest






19. risk = threat x vulnerability - impossible to eliminate - security is an exercise in loss reduction






20. Connection oriented - before systems can communicate over an ATM network - they must establish a virtual circuit between each other - this can span across multiple ATM switches that also handle communications for other systems - at the end of the con






21. An agreement on how different computer will work - protocols define the format and order of messages and what to do upon receipt of the messages - basically the rules of the network






22. Connects the physical part of the network (cables) with the abstract (packets and datastreams)






23. destruction of data - leaking confidential information - providing backdoor access






24. One is for talking - one is for implementing






25. Not a replacement for firewalls - hardening - strong policies - or other DiD methods - low maintenance - inexpensive






26. 8 bytes per packet - UDP SRC port - UDP DST Ports - UDP length - UDP Checksum






27. The practice of sending an ACK inside another packet going to the same destination






28. Intellectual property - business goals - validated data - historical






29. Uses inclusive or exclusive lists - inclusive analysis utilizes a list of keywords - exclusive analysis utilizes a list of events that can be ignored






30. Combines the functionality of a hub and bride into a single device - keeps track of MACs attached to each port






31. Bits of code embedded in programs to quickly gain access at a later time






32. Uses a 1 to 1 substitution of characters - rotate the alphabet by 'n' number of characters - rot+X means rotate the letters X characters






33. Network scanner.






34. -Malicious code might execute destructive overwrite to hard disks -Malicious mas mailing code might expose sensitive information to the internet - web server compromise might expose organization to ridicule - Web server compromise might expose custom






35. Identify critical assets and provide layered protection - data is accessed by applications - applications reside on hosts - hosts operate on networks






36. Known - unknown - zero day






37. 1 and 2 - Voice/Low speed data - 3 - Voice/Data 10Mb - 4 - Voice/Data 16Mb - 5 - 5e - Voice/Data 100Mb to 1Gb - 6 - Standard for gigabit






38. Intrusion detection system - it reports attacks against monitored systems/networks






39. size is whatever the length of the UDP portion of the packet. Could be as large as 65 -535






40. Very simplistic. All systems are attached to the same cable segment. Rarely used because they're unreliable - low fault tolerance - poor traffic isolation - with limited scalability






41. logic bomb - trojan horse - trap door






42. Considered to be a perimeter device






43. Weakness in a system - inherent in a complex system - majority are due to poor coding - gateway by which threats are manifested






44. A time of check/time of use attack that exploits the difference in between when a security control was applied and the time the service was used.






45. Confidentiality - integrity - availability






46. Simple attack done by simply browsing available information that's allowed on a local network.






47. Four layers - Network Layer - Internet Layer - Transport Layer - Application layer






48. Handles transmissions across the physical media like wires - fiber - etc






49. open source tool for monitoring - can be used as a NIDS - has quick updates and flexibility for custom rules






50. 53 bytes - 48 bytes for data - 5 bytes for the header