Data Link Layer
This sublayer provides data encapsulation.
What is the MAC sublayer?
These are the three basic characteristics of IP.
What are connectionless, best effort, and media independent?
An IPv4 address is made up of these two portions.
What are the network and host portion?
What is the transmission control protocol (TCP)?
This is someone who gains access to a network by modifying software or exploiting vulnerabilities.
What is a threat actor?
This is the role that the LLC sublayer performs.
What is take network protocol data and add Layer 2 control information?
This contains a list of all known network addresses.
What is a routing table?
This is what identifies the network and host portion of an IPv4 address.
What is the subnet mask?
The user datagram protocol (UDP) requires fewer header fields for this reason.
What is because it does not provide reliability or flow control?
This is what the three A's in AAA network security stand for.
What is Authentication, Authorization, and Accounting.
This is a device that can receive, create, store, or forward data along a communications path.
What is a node?
This is used to detect corruption in an IPv4 header.
What is the header checksum?
This type of IPv6 address is unique and internet routable.
What is the global unicast address (GUA)?
This port number is well-known to be associated with the simple mail transfer protocol (SMTP).
What is port 25?
Secure Shell (SSH) is more secure than Telnet for this reason.
What is requiring login information and providing data encryption?
The Data Link protocol is responsible for this kind of communication.
What is NIC-to-NIC communication within a network?
There are approximately this many IPv4 addresses.
What is 4 billion?
This type of IPv6 address is within the fe80::/10 range.
What is the link-local address (LLA)?
This is what it means to say that the transmission control protocol (TCP) is a stateful protocol.
What is it keeps track of the state of a communication session?
This is the most effective way to mitigate worm attacks.
What is downloading security updates and patching all vulnerable systems?
This breaks a data stream into decipherable groupings.
What is framing?
IPv4 being connectionless means that this does not exist prior to data being sent.
What is a dedicated end-to-end connection?
These three blocks of IP addresses are exclusively used within private networks.
What are 10.0.0.0/8, 172.16.0.0/12, and 192, 168.0.0/16.
Real-time video and voice communication usually use this protocol.
What is user datagram protocol (UDP)?
This threat to a network can be characterized by poor handling of key electrical components.
What is a maintenance threat?