PKI is made up of the following entities and functions
Uses for PKI (Public Key Infrastructure)
LDAP, ISAKMP, IKE
LDAP is the standard format for accessing certification repositories. Availability and Integrity of LDAP servers is a concern.
ISAKMP Internet Security Association and Key Management Protocol.
IKE ISAKMP, Secure Key Exchange Mechanism (SKEME) and Oakley, combined.
In general
ISAKMP defined the phases for establishing a secure relationship
SKEME describes a secure exchange mechanism
Oakley defined the modes of operation needed to establish a secure connection.
Bad Poodle
Can you match the exploit name to exploited protocol?
Denial-of-Service Attacks
Prevents systems from processing or responding to legitimate traffic
Transmits data packets
Exploits a known fault in an OS, service or application
Results in system crash or CPU at 100%
Distributed reflective denial of service DRDoS
Reflected approach, rather than direct to victim, manipulates traffic so that attack is reflected back to victim from other sources
Example: DNS Poisoning and SMURF
Smurf and Fraggle Attacks
A smurf attack is another type of flood attack, but it floods the victim with Internet Control Message Protocol (ICMP) echo packets instead of with TCP SYN packets. More specifically, it is a spoofed broadcast ping request using the IP address of the victim as the source IP address. Ping uses ICMP to check connectivity with remote systems.
Normally, ping sends an echo request to a single system, and the system responds with an echo reply. However, in a smurf attack the attacker sends the echo request out as a broadcast to all systems on the network and spoofs the source IP address. All these systems respond with echo replies to the spoofed IP address, flooding the victim with traffic.
Smurf amplifier
Smurf attacks take advantage of an amplifying network (also called a smurf amplifier) by sending a directed broadcast through a router. All systems on the amplifying network then attack the victim. However, RFC 2644, released in 1999, changed the standard default for routers so that they do not forward directed broadcast traffic. When administrators correctly configure routers in compliance with RFC 2644, a network cannot be an amplifying network. This limits smurf attacks to a single network. Additionally, it’s becoming common to disable ICMP on firewalls, routers, and even many servers to prevent any type of attacks using ICMP. When standard security practices are used, smurf attacks are rarely a problem today.
Fraggle
Fraggle attacks are similar to smurf attacks. However, instead of using ICMP, a fraggle attack uses UDP packets over UDP ports 7 and 19.
The fraggle attack will broadcast a UDP packet using the spoofed IP address of the victim. All systems on the network will then send traffic to the victim, just as with a smurf attack.
La la, lala lah la, la la la ladi dah (smurf song)

Whether you're preparing for Cybersecurity certification, working with government standards, or simply starting your career in compliance, these are the NIST Federal Information Processing Standards (FIPS), Special Publication (SP), and Interagency Report (IR) topics