Key Terms 1

Question 1

International standardization of system-based network communication through a modular seven-layer architecture.

Answer 1

Open Systems Interconnection (OSI) model

Question 2

Standardization of device-based network communication through a modular four-layer architecture. Specific to the IP suite, created in 1970 by an agency of the U.S. Department of Defense (DoD).

Answer 2

TCP/IP model

Question 3

Core protocol of the TCP/IP suite, which provides connection-oriented, end-to-end, reliable network connectivity.

Answer 3

Transmission Control Protocol (TCP)

Question 4

Core protocol of the TCP/IP suite. Provides packet construction, addressing, and routing functionality.

Answer 4

Internet Protocol (IP)

Question 5

Connectionless, unreliable transport layer protocol, which is considered a “best effort” protocol.

Answer 5

User Datagram Protocol (UDP)

Question 6

Software construct that allows for application- or service-specific communication between systems on a network. Ports are broken down into categories: well known (0–1023), registered (1024–49151), and dynamic (49152–65535).

Answer 6

Ports

Question 7

DoS attack where an attacker sends a succession of SYN packets with the goal of overwhelming the victim system so that it is unresponsive to legitimate traffic.

Answer 7

SYN flood

Question 8

Attack method that allows an attacker to overtake and control a communication session between two systems.

Answer 8

Session hijacking

Question 9

IP version 6 is the successor to IP version 4 and provides 128-bit addressing, integrated IPSec security protocol, simplified header formats, and some automated configuration.

Answer 9

IPv6

Question 10

Logical subdivision of a network that improves network administration and helps reduce network traffic congestion. Process of segmenting a network into smaller networks through the use of an addressing scheme made up of network and host portions.

Answer 10

Subnet

Question 11

Variable-length subnet masking, which allows a network to be divided into different-sized subnets. The goal is to increase the efficiency of the use of IP addresses since classful addressing schemes commonly end up in unused addresses.

Answer 11

Classless Interdomain Routing

Question 12

Transition mechanism for migrating from IPv4 to IPv6. It allows systems to use IPv6 to communicate if their traffic has to transverse an IPv4 network.

Answer 12

6to4

Question 13

Transition mechanism for migrating from IPv4 to IPv6. It allows systems to use IPv6 to communicate if their traffic has to transverse an IPv4 network, but also performs its function behind NAT devices.

Answer 13

Teredo

Question 14

An IPv6 transition mechanism meant to transmit IPv6 packets between dual-stack nodes on top of an IPv4 network.

Answer 14

Intra-Site Automatic Tunnel Addressing Protocol

Question 15

Standard that specifies a set of protocols to meet the security requirements for protecting data traversing Ethernet LANs.

Answer 15

IEEE 802.1AE (MACSec)

Question 16

Standard that specifies unique per-device identifiers (DevID) and the management and cryptographic binding of a device (router, switch, access point) to its identifiers.

Answer 16

IEEE 802.1AR