Chapter 9 Flashcards
1
Q
SNMP agents receive requests from an NMS on what port number? A) 161 B) 162 C) 163 D) 160
A
A) 161
2
Q
What security standard below was created to protect credit card data and transactions, requiring network segmentation as part of security controls? A) CALEA B) HIPAA C) PCI DSS D) CAARA
A
C) PCI DSS
3
Q
Packets that exceed the maximum packet size are known by what term? A) giants B) runts C) ghosts D) jabbers
A
A) giants
4
Q
Packets that are smaller than a medium's minimum packet size are known by what term below? A) jabbers B) giants C) ghosts D) runts
A
D) runts
5
Q
When a device handles electrical signals improperly, usually resulting from a bad NIC, it is referred to by what term below? A) ghost B) jabber C) talker D) blabber
A
B) jabber
6
Q
Which of the following is not a requirement in order to use a softphone?
A) An IP telephony client
B) The ability to communicate with a digital telephone switch
C) A microphone and speakers, or a headset
D) A wireless carrier to handle the voice path
A
D) A wireless carrier to handle the voice path
7
Q
What percentage of internet traffic, as estimated by Cisco Systems, will be devoted to video traffic by 2018? A) 20% B) 65% C) 79% D) 93%
A
C) 79%
8
Q
In a VoIP call, what method of transmission is used between two IP phones? A) global multicast B) multicast C) unicast D) broadcast
A
C) unicast
9
Q
On circuit switched portions of a PSTN, what set of standards established by the ITU is used to handle call signaling? A) MCU B) H.323 C) H.225 D) SS7
A
D) SS7
10
Q
Which element of H.323 is a device that provides translation between network devices running the H.323 signaling protocols and devices running other types of signaling protocols? A) H.323 terminal B) H.323 gateway C) H.323 gatekeeper D) MCU
A
B) H.323 gateway
11
Q
In H.323, which protocol below handles call or videoconference signaling? A) H.225 B) H.245 C) H.200 D) H.252
A
A) H.225
12
Q
A computer that provides support for multiple H.323 terminals and manages communication between them is known as what term below? A) H.323 gateway B) H.323 gatekeeper C) MCU D) H.323 server
A
C) MCU
13
Q
A server running the SIP protocol listens on what TCP/UDP port for unsecured communications? A) 6050 B) 5060 C) 5061 D) 6051
A
B) 5060
14
Q
What component of SIP is a server that responds to user agent clients' requests for session initiation and termination? A) proxy server B) registrar server C) user agent server D) redirect server
A
C) user agent server
15
Q
When using SIP, what term is used to descibe end-user devices, which may include workstations, tablet computers, smartphones, or IP phones? A) user agent B) user agent client C) user agent proxy D) user agent node
A
B) user agent client
16
Q
In order for gateways to exchange and translate signaling and control information with each other so that voice packets are properly routed through a network, what intermediate device is needed? A) media gateway B) media proxy server C) media gateway controller D) analog switch
A
C) media gateway controller
17
Q
When using DiffServ, what type of forwarding utilizes a minimum departure rate from a given node, which is then assigned to each data stream? A) assured forwarding B) prioritized forwarding C) scaled forwarding D) expedited forwarding
A
D) expedited forwarding
18
Q
The Priority Code Point field in a frame consists of how many bits? A) 2 bits B) 3 bits C) 5 bits D) 8 bits
A
B) 3 bits
19
Q
What protocol enables multiple types of Layer 3 protocols to travel over any one of several connection-oriented Layer 2 protocols? A) DiffServ B) MPLS C) CoS D) SIP
A
B) MPLS
20
Q
A highly available server is available what percentage of the time? A) 90% B) 99% C) 99.9% D) 99.99%
A
D) 99.99%
21
Q
What two log files are used by older versions of Unix and newer version of Linux to store log information? A) /var/log/messages B) /var/log/syslog C) /var/log/log D) /var/adm/messages
A
A) /var/log/messages
B) /var/log/syslog
22
Q
What two terms below are used to describe a telephone switch that connects and manages calls within a private organization? A) public branch exchange B) private branch exchange C) PBX D) PBE
A
B) private branch exchange
C) PBX
23
Q
What two terms below describe the process of manipulating certain characteristics of packets, data streams, or connections to manage the type and amount of traffic traversing a network or interface at any moment? A) bandwidth policing B) throughput shaping C) traffic shaping D) packet shaping
A
C) traffic shaping
D) packet shaping
24
Q
What two terms below describe a network device with three ports, two of which send and receive all traffic, and the third port mirrors the traffic? A) network hub B) network tap C) network splitter D) packet sniffer
A
B) network tap
D) packet sniffer
25
Q
What two terms below are used to describe an analog-to-digital voice conversation device that accepts and interprets both analog and digital voice signals? A) IP PBX B) digital PBX C) ATA PBX D) ePBX
A
A) IP PBX
B) digital PBX
