Security

Question 1

CIA Triad

Answer 1

Confidentiality
Integrity
Availability

Question 2

Symmetric Encryption

Answer 2

One key for sender and receiver

Question 3

DES

Answer 3

56 bit key
Used by SNMPv3
Considered weak today
Symmetric

Question 4

3DES

Answer 4

Three 56bit keys (168 bit)
Encrypt, decrypt, encrypt
Symmeyric

Question 5

AES (Advanced Encryption Standard)

Answer 5

Preferred symmetric encryption
Used in WPA2
128, 192 or 256 bit key
Symmetric

Question 6

RSA

Answer 6

Asymmetric

PKI to exchange key

Question 7

Asymmetric Encryption

Answer 7

2 keys

Public and private

Question 8

Hashing

Answer 8

An algorithm that runs a string of data and creates a hash or hash digest
Servers as a unique fingerprint for a file.

Question 9

MD5

Answer 9

128 bit hash digest

Can have hash collisions

Question 10

SHA-1

Answer 10

160 bit hash digest

Less collison

Question 11

SHA-256

Answer 11

256 digest

Question 12

CRAMMD5

Answer 12

Commonly used for emails

Question 13

DoS attack

Answer 13

Floods victim server with service requests, cause memory shortage and crash

Question 14

TCP SYN Flood

Answer 14

Variant of DoS. Attacker initiates multiple tcp sessions but never finishes the handshake

Question 15

Smurf

Answer 15

Sends a ping to the broadcast address, devices all reply and takes up bandwidth

Question 16

Stateful Firewall

Answer 16

Inspect traffic as part of sessions

Question 17

Packet-filtering firewall

Answer 17

Permit or deny entry based on contents of packet header

Question 18

NGFW

Answer 18

Third gen

Deep packet inspection to filter out packets based on the packets entire content

Question 19

ACL

Answer 19

List of rules assigned to router/firewall