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Chap 11 and 12 Quiz
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| Question | Answer |
|---|---|
| T/F: Most UNIX and Linux desktop operating systems provide a GUI application for easily viewing and filtering the information in system logs. | True |
| T/F: The SNMP version 3 protocol introduces authentication, validation, and encryption for messages exchanged between devices and the network management console. | True |
| T/F: Wireshark or any other monitoring software running on a single computer connected to a switch doesn't see all the traffic on a network, but only the traffic the switch sends to it, which includes broadcast traffic and traffic specifically addressed. | True |
| T/F: Class of Service utilizes 8 levels of priority, and modifies the PCP field in an 802.1Q tag. | True |
| T/F: You can find out where various logs are kept on some UNIX and Linux systems by viewing the /etc/syslog.conf or /etc/rsyslog.conf files. | True |
| T/F: Setting a NIC to run in promiscuous mode will allow it to see all network traffic passing through a network switch. | False |
| T/F: A system with an availability of 99.999% can be down for a maximum of 52 minutes per year. | False |
| T/F: A RAID 5 configuration requires a minimum of two hard disks to operate. | False |
| T/F: A brownout is a momentary decrease in voltage; also known as a sag. | True |
| T/F: A hot site consists of computers, devices, and connectivity necessary to rebuild a network exist, but without appropriate configuration. | False |
| When using SNMP with TLS, what port do agents receive requests on? | 10161 |
| At what point is a packet considered to be a giant? | It becomes a giant when it exceeds the medium's maximum packet size. |
| Packets that are smaller than a medium's minimum packet size are known by what term below? | runts |
| When a device handles electrical signals improperly, usually resulting from a bad NIC, it is referred to by what term below? | jabber |
| When using DiffServ, what type of forwarding utilizes a minimum departure rate from a given node, which is then assigned to each data stream? | expedited forwarding |
| What 3-bit field in a 802.1Q tag is modified to set a frame's Class of Service (CoS)? | Priority Code Point (PCP) |
| A highly available server is available what percentage of the time? | 99.999% |
| What happens when an NMS uses the SNMP walk command? | The NMS uses get requests to move through sequential rows in the MIB database. |
| When Comcast was found to be interfering with BitTorrent traffic, what method was being used? | Comcast was interjecting TCP segments with the RST (reset) field set. |
| What term is used to describe the average amount of time that will pass for a device before a failure is expected to occur? | mean time between failures (MTBF) |
| The Link Aggregation Control Protocol was initially defined by what IEEE standard? | IEEE 802.3ad |
| Which of the following statements describes a RAID 0 configuration? | In a RAID 0, data is striped across multiple disks to improve performance. |
| What Storage Area Network (SAN) protocol runs on top of TCP, and can be used on an existing twisted-pair Ethernet network, while maintaining low cost? | Internet SCSI (iSCSI) |
| A differential backup covers what data on a system? | It includes data that has changed since the last full backup. |
| Which type of uninterruptible power supply uses AC power to continuously charge its battery, while also providing power to devices through the battery? | online UPS |
| In planning for disaster recovery, what is the ultimate goal? | The continuation of business. |
| How does a line conditioning UPS protect network equipment? | It filters line noise from incoming power. |
| You are attempting to determine how available your Linux systems are, and need to find the current system uptime. What command should you use? | uptime |
| What makes up the first 6 bits of the 8-bit DiffServ field? | Differentiated Services Code Point (DSCP) |
| A network TAP serves what purpose on a network? | It provides a mirrored port for monitoring traffic between other ports. |
| When viewing a syslog message, what does a level of 0 indicate? | The message is an emergency situation on the system. |
| Each managed object on a managed device using SNMP is assigned which of the following? | object identifier (OID) |
| Once a device has failed, what metric measures the average amount of time to repair? | mean time to repair (MTTR) |
| What does the Common Address Redundancy Protocol do? | It allows a pool of computers or interfaces to share the same IP address. |
| The grouping of multiple servers so that they appear as a single device to the rest of the network is known as which term? | clustering |
| Which type of backup scheme only covers data that has changed since the last backup? | incremental backup |
| What is distributed switching? | It is a single distributed vSwitch that can service VMs across multiple hosts. |
| If you wish to maintain a "4 nines" availability rating, what is the maximum amount of down time you can have per day? | 8 seconds |
| A snapshot is most similar to which type of backup scheme? | incremental backup |
| What statement regarding the use of a network attached storage device is accurate? | A NAS can be easily expanded without interrupting service. |
| T/F: WANs connect nodes, such as workstations, servers, printers, and other devices, in a small geographical area on a single network. | False |
| T/F: In a frame relay WAN, the ISP typically has the data circuit terminating equipment (DCE). | True |
| T/F: An 802.11ac signal can travel for approximately 2 miles from the source. | False |
| T/F: In a public switched telephone network, lines are terminated at the central office. | True |
| T/F: DSL signals travel over telephone lines using the 300 to 3300 Hz frequency range. | False |
| T/F: DSL services require many subscribers to share the same local line, causing potential security concerns. | False |
| T/F: Although MPLS can operate over Ethernet frames, it is more often used with other Layer 2 protocols, like those designed for WANs. | True |
| T/F: Most satellites circle the Earth 22,300 miles above the equator in a geosynchronous orbit. | True |
| T/F: CDMA (Code Division Multiple Access) is an open standard that is accepted and used worldwide. | False |
| T/F: The word "synchronous" as used in the name of Synchronous Optical Network means that data being transmitted and received by nodes must conform to a timing scheme. | True |
| What is the maximum throughput of a DS3 connection? | 44.736 Mbps |
| Multiplexing enables a single T1 circuit to carry how many channels? | 24 |
| In an ISDN connection, what amount of throughput did a single B channel provide? | 64 Kbps |
| What is the size of an ATM cell, including the header? | 53 bytes |
| Which of the following is an advantage of leasing a frame relay circuit over leasing a dedicated circuit? | You pay only for the bandwidth you require. |
| Of all the DSL standards, which is the most commonly in use today? | ADSL |
| The DTE or endpoint device for a leased line is known as which device below? | CSU/DSU |
| What OC level is primarily used as a regional ISP backbone, and occasionally by very large hospitals, universities, or other major enterprises? | OC-48 |
| The C-Band utilized by satellites consists of what frequency range? | 3.4 - 6.7 GHz |
| In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol? | Carrier Ethernet Transport |
| Which statement regarding the use of cable modems is NOT accurate? | Cable modems only operate at the Physical layer of the OSI model. |
| The T-carrier standards, also called T-CXR standards, utilize what type of multiplexing over two wire pairs to create multiple channels? | time division multiplexing (TDM) |
| On an ATM network, how is the path that data will take determined? | Switches determine the optimal path between sender and receiver, and then establish the path before transmission. |
| What type of virtual circuit allows connections to be established when parties need to transmit, then terminated after the transmission is complete? | switched virtual circuit (SVC) |
| Which of the following Layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone? | SONET (Synchronous Optical Network) |
| Where are MPLS labels placed within a frame? | between the layer 2 header and the layer 3 header |
| What is a data-link connection identifier (DLCI) utilized for? | It is used by routers to determine which circuit to forward a frame to in a frame relay network. |
| Which statement regarding the Asynchronous Transfer Mode (ATM) technology is accurate? | ATM can provide 4 levels of QoS, from best effort delivery to guaranteed, real-time transmission. |
| The Global System for Mobile Communications (GSM) utilizes what technology to create timeslots on a channel? | time division multiple access (TDMA) |
| When using satellite services for your WAN connection, what statement is accurate? | Satellite services suffer more latency and jitter issues. |
| Considering that multiple users occupy the same channel when using CDMA, how are various calls using this technology kept separate? | The packets are coded such that individual calls can be distinguished. |
| Which SONET OC level is a popular choice for large businesses, and is equivalent to 100 T1s? | OC-3 |
| With a SIP trunk, what is the only limitation on the number of calls that can run at any one time? | The amount of available bandwidth. |
| In North America, what ISDN connection type used two B channels and one D channel? | Basic Rate Interface (BRI) |
| In a public switched telephone network, what portion of the network is known as the local loop? | It is the portion that connects any residence or business to the nearest central office. |
| Which type of DSL technology has equal download and upload speeds maxing out at around 2 Mbps? | SDSL |
| When using DOCSIS 3.0, what is the minimum number of channels that can be used? | 4 |
| A fractional T1's bandwidth can be leased multiples of what data rate? | 64 Kbps |
| In a cellular network, where does each wireless base station connect to? | They connect to a mobile switching center. |
| How many transponders are contained within a typical satellite? | 24 to 32 |
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TheGoldenCPU
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