Module 4 Flashcards
What does ACL mean?
Access Control List
A series of IOS commands that are used to filter packets based on information found in the packet header
ACL
An ACL uses a sequential list of permit or deny statements, known as ____
access control entries (ACEs)
ACEs are also commonly called ____
ACL statements
___ controls access to a network by analyzing the incoming and/or outgoing packets and forwarding them or discarding them based on given criteria
Packet Filtering
Two types of ACLs
Standard and Extended ACLs
Type of ACL, which only filters at Layer 3 using the source IPv4 address only.
Standard ACL
Type of ACL that filters at Layer 3 using the source and/or destination IPv4 address. They can also filter at Layer 4 using TCP, UDP ports, and optional protocol type information for finer control.
Extended ACL
An ____ ACL filters packets before they are routed to the outbound interface.
inbound
A ____ is similar to a subnet mask in that it uses the ANDing process to identify which bits in an IPv4 address to match
wildcard mask
This keyword substitutes for the 0.0.0.0 mask. This mask states that all IPv4 address bits must match to filter just one host address.
host
This keyword substitutes for the 255.255.255.255 mask. This mask says to ignore the entire IPv4 address or to accept any addresses
any
____ ACLs are the preferred method to use when configuring ACLs
Named
____ ACLs should be located as close as possible to the source of the traffic to be filtered
Extended
____ ACLs should be located as close to the destination as possible
Standard
