Differentiated services or DiffServ is a computer networking architecture that specifies a simple and scalable mechanism for classifying and managing network traffic and providing Quality of service on modern IP networks.
Can provide low-latency to voice or streaming media While providing simple best-effort service to non-critical services DiffServ uses a 6-bit differentiated services code point (DSCP) in the 8-bit differentiated services field (DS field) in the IP header for packet classification purposes.
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DNS cache poisoning is when an attacker targets a DNS server to query a malicious DNS server. The Malicious server can then tell the target DNS server spoofed DNS information and the DNS server will cache that spoofed information.
The solution is to use Domain Name System Security Extensions (DNSSEC) for domain name resolution.
cite: CompTIA Network+
Dynamic Adaptive Streaming over HTTP (DASH) is an adaptive bitrate streaming technique that enables streaming of high quality media content over the internet delivered from conventional HTTP web servers.
Source # Wikipedia - DASH
Scramble, mix up, or change data so that it can’t be read.
Cipher General term for a way to encrypt data Algorithm Mathematical formula that underlies the cipher Substitution XOR Ciphertext The result of running cleartext through a cipher algorithm using a key Symmetric-Key Encryption
H.323 is a Recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network . The H.323 standard addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multi-point conferences.
Source Port: 1720
In cryptography , an initialization vector (IV) or starting variable (SV) is an input to a cryptographic primitive being used to provide the initial state. The IV is typically required to be random or pseudorandom, but sometimes an IV only needs to be unpredictable or unique. Randomization is crucial for some encryption schemes to achieve semantic security, a property whereby repeated usage of the scheme under the same key does not allow an attacker to infer relationships between (potentially similar) segments of the encrypted message.
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https://en.wikipedia.org/wiki/Interior_gateway_protocol
An intermediate distribution frame (IDF) is a distribution frame in a central office or customer premises, which cross connects the user cable media to individual user line circuits and may serve as a distribution point for multipair cables from the main distribution frame (MDF) or combined distribution frame (CDF) to individual cables connected to equipment in areas remote from these frames.
Source: https://en.wikipedia.org/wiki/Intermediate_distribution_frame