N10-007.1 Flashcards
First set of review questions (35 cards)
What layers of the OSI model does QoS live on?
Layer 2 (Data Link) and Layer 3 (Network)
What is split domain name system?
Split Domain Name System (Split DNS) is an implementation in which separate DNS servers are provided for internal and external networks as a means of security and privacy management.
https://www.techopedia.com/definition/1346/split-domain-name-system-split-dns
What is DWDM?
Dense Wavelength Division Multiplexing, an optical technology used to increase bandwidth over existing fiber optic backbones.
More Explanation -> https://www.webopedia.com/TERM/D/DWDM.html
What is TACACS+?
Uses TCP. TACACS+ is a protocol that handles authentication, authorization, and accounting (AAA) services
What is DOCSIS?
Data Over Cable Service Interface Specification, or DOCSIS, is an international telecommunications standard that allows for the addition of high-bandwidth data transfer to an existing coaxial cable TV system. It allows Internet speeds to increase without having to completely replace coaxial cable networks.
What is an autonomous system number?
A public AS has a globally unique number, an AS Number, associated with it. This number is used both in the exchange of exterior routing information (between neighboring Autonomous Systems) and as an identifier of the AS itself.
There are two types of AS Numbers:
Public AS Numbers Private AS Numbers
What is network utilization?
Network utilization is the ratio of current network traffic to the maximum traffic that the port can handle. Through monitoring network utilization, we can understand whether the network is busy, normal or idle.
What protocol is designed to avoid loops on a layer 2 network?
802.1d (Spanning Tree Protocol)
What do NAS and SAN use to encapsulate frames?
ISCSI
What is ISCSI?
iSCSI is a transport layer protocol that describes how Small Computer System Interface (SCSI) packets should be transported over a TCP/IP network.
What is SCSI?
Small Computer System Interface, is a set of American National Standards Institute (ANSI) standard electronic interfaces that allow personal computers (PCs) to communicate with peripheral hardware faster and more flexibly than previous parallel data transfer interfaces
What is SIEM?
Security information and event management. SIEM software collects and aggregates log data generated throughout the organization’s technology infrastructure, from host systems and applications to network and security devices such as firewalls and antivirus filters.
What does a non-persistent agent do?
This is a posture assessment software that doesn’t require that it be installed into the operating system. It starts up, it runs its process, checks the health of the system, and then it terminates and is no longer loaded on that particular device.
What is a CSU?
The Channel Service Unit (CSU) receives and transmits signals from and to the WAN line and provides a barrier for electrical interference from either side of the unit.
What is a switch?
A switch is a network device that connects network components. It uses MAC addresses to learn which devices reside off of which port.
What is a client/server network?
In a client/server network, a dedicated server (for example, a file server or a print server) provides shared access to a resource (for example, files or a printer). Clients (for example, PCs) on the network with appropriate privilege levels can gain access to those shared resources.
What is a partial mesh topology?
A hybrid of a hub-and-spoke topology and a full-mesh topology. A partial-mesh topology can be designed to provide an optimal route between selected sites, while avoiding the expense of interconnecting every site to every other site.
What is current state modulation?
One way to electrically or optically represent a binary 1 or 0 is to use current state modulation, which represents a binary 1 with the presence of voltage (on a copper cable) or the presence of light (on a fiber-optic cable). Similarly, the absence of light or voltage represents a binary 0.
What is state transition modulation?
Uses the transition between a voltage level (for example, going from a state of no voltage to a state of voltage, or vice versa, on a copper cable) or the transition of having light or no light on a fiber-optic cable to represent a binary 1. Similarly, a binary 0 is represented by having no transition in a voltage level or light level from one time period to the next.
What are the 7 layers of the OSI model? (top to bottom)
Application, Presentation, Session, Transport, Network, Data-Link, Physical
What are the four layers of the TCP/IP Stack? (top to bottom)
Application, Transport, Internet, Network Interface
What is a content switch?
Can be used to load-balance requests for content across a group of servers containing that content. If one of the servers in the group needs to have maintenance performed, that server could be administratively removed from the group, as defined on the content switch.
What is single-mode fiber?
SMF cabling has a core with a diameter large enough to permit only a single path for light pulses (that is, only one mode of propagation). By having a single path for light to travel, SMF eliminates the concern of multimode delay distortion.
What is ANT+?
A wireless protocol for monitoring sensor data such as a person’s heart rate or a car’s tire pressure, as well as for controlling systems such as indoor lighting and television sets.
