Ch. 17 Packet Flashcards
When designing and building a network, which requirements define the network’s needs?
List of requirements
When designing and building a network, which requirements help in determining how to organize the network?
Device types/requirements
When designing and building a network, which requirements help in determining how to connect to the Internet
Wired/wireless considerations
By going __________ for some or all server resources, you can reduce your power usage and increase uptime.
virtual
How do many small networks avoid using a full-blown file server?
Small networks take advantage of network attached storage (NAS).
What type of conversion process occurs with power converters?
AC to DC
Which device is an example of a peripheral device?
Printer
Which device is an example of a serious enterprise WAP?
A Cisco Aironet device
Before plugging in RJ 45 cables, what should you determine to save a lot of time and effort once the system installation starts?
Internal IP addressing scheme
Which company is leading the cutting edge of the unified communication (UC) field?
Cisco
Which TCP/IP ports does the Real-time Transport Protocol (RTP) use for VoIP systems?
5004 and 5005
Which TCP/IP ports does the Session Initiation Protocol (SIP) use for VoIP systems?
5060 and 5061
Unified communication leans heavily on ___________ for transmission.
SIP and RTP
Which TCP/IP port does unified communication use?
1720
Which TCP/IP ports does MGCP use?
2427 and 2727
What bandwidth does ISDN offer?
128 Kbps
When talking about QoS for medianets, an administrator needs to develop the concept of __________.
differentiated Services (DiffServ)
Which value of the ECN field is the default, indicating “not QoS aware”?
00
Which value of the ECN field indicates “QoS aware, congestion encountered”?
11
Which value of the ECN field indicates “QoS aware, no congestion”?
10
Within the Differentiated Services (DiffServ) architecture, how many classes of service (CoS) are there?
Eight
In most QoS setups using differentiated services code point (DSCP) there are only __________ levels of priority.
four
In the early days of automation, you might have a single person, known as a(n) __________, monitoring a machine that produced something.
operator
Which industrial control system (ICS) device monitors characteristics like temperature?
Sensor
Which industrial control system (ICS) device knows enough to manage a process?
Controller
In a modern DCS each of the local controllers connects (eventually) to a centralized controller—what CompTIA calls the __________—where global changes can be made managed.
ICS server
Which industrial control system (ICS) device makes changes that modify a characteristic such as temperature?
Actuator
A supervisory control and data acquisition (SCADA) system is a subset of the __________.
industrial control system (ICS)
ICS/DCS/SCADA and other networks are traditionally good candidates for network __________.
segmentation
Which term refers to the physical separation of your network from every other network?
Air gap
