A highly available server is available what percentage of the time

QuestionAnswer 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

Which formula is used to determine a cloud provider's availability percentage?

Which packet type is smaller than the medium's minimum packet size?

What statement regarding the use of network attached storage device is accurate?

What is it called when a regular time is set aside to update the company servers at once?