review Flashcards
What is cryptography?
The study of obsfucation
what is DES?
DES - Data Encryption Standard is a 56 bit symmetrical key algorithm. Relatively insecure due to short 56 bit key length. Used in WEP largely replaced by more secure AES encryption.
IDS vs IPS
IDS lets you know when something happens
IPS can prevent threats from happening
What was one of the first web encryptions?
SSL
when did SSL come out?
1995
If you want a virus to run in the background where would you put it?
memory
Do routers fragment packets ipv4? ipv6?
ipv4 yes, ipv6 no
whats the difference between ping and traceroute
Ping checks a connection, traceroute tracks all hops
Where are buffers located?
Data sections, heaps, or stacks
how many bytes is a traceroute packet?
32
What type of barcode is on your CAC? front and back
front: PDF14
Back: code 39
what is data sanitation?
SQL injection protection
Trojan v spyware v worm
trojan: cloak and dagger
spyware: sends info to an outside
worm: self replication, no interaction
What is a single point firewall?
a funnel for all traffic located outside of the router separating your router and the internet
know your routing header
what protocol is used to find near by networks?
Neighbor discovery protocol (IPv6)
How many bytes make up shell code?
25
Where is the first place your computer looks for a DNS query?
Cache
What does a hybrid firewall do?
Multiple firewalls with different functions, that way every part of the network is examined
types of IDS
HIDS - Host-Based Intrusion Detection System
PIDS - Perimeter Intrusion Detection System
VMIDS - Virtual Machine Based Intrusion Detection System
NIDS - Network Intrusion Detection System
whats the difference between telnet and ssh?
telnet is plaintext, ssh is encrypted
Whats the default amount of packets sent on a ping?
4
where would an IDS be located?
behind the firewall
When youre able to give yourself privileges on a system -
broken authentication
what is dynamic packet filtering?
considers the contents of the packet as it comes through
is dynamic packet filtering stateful or stateless?
stateful
3 types of DNS queries?
recursive, non recursive, iterative
What DNS query travels upstream?
recursive
what is stateless packet filtering?
based off destination and source, doesnt care about contents
In netscan, what is -T0 vs -T5?
-T0 is harder to see but takes longer, -T5 is fastest but easier for the host to detect.
what is the GA law for computer trespassing?
OCGA 16-9 93b
IPv6 multicast address
ff00::/8
what is the belt and suspenders architecture?
two firewalls, one after the router, and one after your public facing servers
