C2 level security provides for Discretionary Access Control, Identification and Authentication, Auditing, Resource reuse.

It means someone tried to hack the security of the network.

LDAP (Lightweight Directory Access Protocol) is a protocol for communications between LDAP servers and LDAP clients. LDAP servers store "directories" which are access by LDAP clients.
LDAP is called lightweight because it is a smaller and easier protocol which was derived from the X.500 DAP (Directory Access Protocol) defined in the OSI network protocol stack.

Phishing is an attempt to illegally gain access of the sensitive informations like Username & passwords.
Basically its done thru email & Instant messenging.

ex:- Targeting the bank sites ,Ebay

The principle of least privilege requires that an application be given only those privileges that it needs to carry out its function and no more.

Active Directory (AD) sites, which consist of well-connected networks defined by IP subnets that help define
the physical structure of your AD, give you much better control over replication traffic and authentication traffic than the control you get with Windows NT 4.0 domains.
Because AD relies on IP, all LAN segments should have a defined IP subnet. This makes creating your AD site structure straightforward; you simply group well-connected subnets to form a site.

Creating AD sites benefits you in several ways, the first of which is that creating these sites lets you control
replication traffic over WAN links. This control is important in Windows 2000 because any Win2K domain
controller (DC) can originate changes to AD. To ensure that a change you make on one DC propagates to all DCs, Win2K uses multimaster replication (instead of the single-master replication that NT 4.0 uses). You might think that multimaster replication would make it difficult to plan for AD replication's effect on your WAN links, but you can overcome this obstacle using AD sites.