Test your basic knowledge |

Comptia Security +: Network Security

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. Used by ISPs - single public network IP address is shared among many hosts on a private network - also known as PAT






2. Known as thicknet - 10mbps - limited to 500 meters






3. Capture and analyze network traffic - also known as packet analyzer - sniffer - network analyzer






4. A person or program masquerades as another by presenting false information to gain an illegitimate advantage






5. Allows all traffic except traffic that is specifically denied - also known as permissive access






6. A pool of public IP addresses is shared by a collection of private IP addresses






7. A packet filtering firewall works at this layer of the OSI model






8. Variation of the SYN flood where SYN packets are spoofed to have the same source and destination IP address and port






9. IP spoofing attack where the attacker can only send packets and has to guess about replies






10. A flaw in TCP/IP to verify that a packet really comes from the addess indicated in the IP header leads to this attack






11. Level 2 firewall often used to filter web traffic






12. Firewall that communicates directly with a perimeter router and the internal network - 2 NICs - screens internal traffic






13. DMZ implementation using two firewalls with different rule sets for the DMZ and intranet






14. Head of a packet contains...






15. IDS that relies on the identification of known attack signatures






16. A sniffer mode used to capture traffic addressed to/from another machine on the network






17. Level 1 firewall that looks at the head of a packet - (not content) - operates rapidly - application independent - either allow or deny packets






18. A logical division of a computer network - in which all nodes can reach each other by broadcast at the data link layer - equivalent to a VLAN






19. Forging an IP address with the address of a trusted host






20. A group of hosts on logical network segment that communicate as if they were attached to the same broadcast domain - regardless of their physical location






21. Known as thinnet - 10mbps - limited to 185 meters






22. Firewall with two NICs - one internal and one external facing - NAT is often used with this firewall






23. Cable used most in networks - maximum speed 1Gbps - maximum length 100 meters - susceptible to tap






24. Examines content passing through and makes a decision on the data based on a set of criteria - normal uses email filtering and web browsing






25. Type of IP addresses not routed on the internet: 10.x.x.x - 172.16.x.x - 192.168.x.x






26. One process on every system - use local system resources - detect attacks that NIDS misses - examine data after decrypted - can be OS specific - more expensive






27. Used to pass data from one VLAN to another






28. Twisted pair cable with speed capability of 10Mbps






29. Firewall that intercepts and inspects messages before delivering them - placed between trusted and untrusted networks - degrade network traffic - also know as application gateway






30. Most common DMZ implementation using three firewall interfaces (internet - intranet - DMZ)






31. Attempt to block service or reduce activity by overloading the victim machine with ping requests






32. An attacker redirects valid request to malicious sites by feeding a DNS server altered records which are retained in its cache






33. Cable with copper core - has no physical transmission security and is easy to tap - 10mbps - maximum length 500 meters






34. A set of rules computers use to communicate with each other across a network






35. IP - email - website - DNS - and ARP






36. Promiscuous NIC to sniff passing traffic - admin NIC to send alerts to centralized management system






37. Ping flooding - ping of death - smurf - fraggle - SYN flood - land - teardrop - email flood






38. Cable designed for transmission at higher speeds (100Mbps - 2Gbps) and longer distances (2km) - expensive -eliminates signal tapping






39. Take control of a session between a server and client - the users gets kicked off the session while the attacker inserts himself into the session by sending a reset request to the client






40. Network configuration that permits selected outsiders access internal information systems






41. A DoS attack that subverts the normal "three way handshake" of TCP/IP by sending SYN packets - but no corresponding ACK packets






42. An attacker redirects traffic by falsifying the IP address requested by ARP request






43. A physical or logical subnetwork that houses systems accessible to a larger untrusted network - usually the Internet - also known as DMZ






44. A decoy system - intentionally left exposed to attract/distract attackers - logs and monitors attacker activities






45. Unauthenticated Windows session where an attacker can gather list of users - groups - machines - shares - user and host SID






46. Firewall with several NICs connected to different networks






47. A server that sits between an intranet and it's Internet connection - masking all IP addresses






48. A method - used by switches and email servers - of delivering messages which are temporarily held by an intermediary before being sent to their final destination






49. Two authoritative sources for your domain namespace with differing contents depending on whether the query is internal or external






50. Session hijacking countermeasure