Routing Protocols Administrative Distance

Protocol	Administrative Distance
Connected	0
Static	1
EIGRP summary	5
External BGP	20
Internal EIGRP	90
IGRP*	100
OSPF	110
IS-IS	115
RIP	120
EGP*	140
ODR	160
External EIGRP	170
Internal BGP	200
Infinite
* Deprecated

OSPF NETWORKs TYPES summary

OSPF NETWORK TYPE	Helo Addressing	Database Exchange Addresing	DR/BDR Election	Issues	Link Advertisement	Next Hop
Broadcast	Multicast 224.0.0.5	Multicast 224.0.05 224.0.0.6	Yes	Partial Mesh, NBMA Topology Hub and spoke Placement of DR (HUB) placement of BDR (none)	Link is advertised as prefix	Next hop is advertising router
Nonbroadcast	Unicast	Unicast	Yes	Partial Mesh, NBMA Hub and spoke Placement of DR (Hub) Placement of BDR Neighbor Statements	Link is advertised as prefix	Next Hop is advertising Router
Point to Point	Multicast 224.0.0.5	Multicast 224.0.0.5	No	Flood Administration overhead related to the subnetting	Link is advertised as prefix	Next hop is the other end of the point-to-point link
Point to mulipoint Broadcast	Multicast 224.0.0.5	Multicast 224.0.0.5	No	Flood Host entries /32 for the ends of the multipoint colection	Link is advertised as a number of host entries	Next hop is the other end of the point-to-point link
Point to Multipoint NonBroadcast	Unicast	Unicast	No	Flood Host entries /32 for the ends of the multipoint colection	Link is advertised as a number of host entries	Next hop is the other end of the point-to-point link

Physical Security Considerations

Many companies are merging physical security and IT security departments and functions. This makes a lot of sense given that the line between the two is not at all clear. For example, if a user swipes a badge, then a server unlocks a door, that’s a blend of physical security and IT technology. If that door leads to the computer room or even a wiring closet, then it is IT security, too.  In this domain, both sides will be considered.

Law, Investigation, Forensics and Ethics

One of the most difficult and challenging parts of a security manager’s job responsibility can be the handling of incidents and investigations. Let's dive into this domain to discuss the steps an ISSMP must take to prepare for, detect, react to, correct, report, and learn from every incident that does occur.

Technology Related Business Continuity Planning (BCP) and Disaster Recovery Planning (DRP)

The relationship between BCP and DRP is often misunderstood, and even worse, sometimes used interchangeably. A BCP is an examination of a business. It is done once. A DRP is created for every likely or feasible scenario, so that when the bad event happens, a plan will exist for dealing with it. The relationship is one BCP to many DRPs. Now let's dive into this deeper in this video.

CISSP-ISSMP: Understand Business Continuity Planning (BCP) and Disaster Recovery Planning (DRP)

Organizations need to prepare for the risk of an interruption to services or operations and put in place plans that will help prevent such failures, minimize the impact if an incident were to happen and manage the recovery to normal operations as quickly as possible. Let's discuss in this domain. 

U.S. Government Information Assurance Related Policies and Issuances