Flashcards in Chapter 11 Deck (40)
Most UNIX and Linux desktop operating systems provide a GUI application for easily viewing and filtering the information in system logs.
The SNMP version 3 protocol introduces authentication, validation, and encryption for messages exchanged between devices and the network management console.
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 to the computer.
Class of Service utilizes 8 levels of priority, and modifies the PCP field in an 802.1Q tag.
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.
Setting a NIC to run in promiscuous mode will allow it to see all network traffic passing through a network switch.
A system with an availability of 99.999% can be down for a maximum of 52 minutes per year.
A RAID 5 configuration requires a minimum of two hard disks to operate.
A brownout is a momentary decrease in voltage; also known as a sag.
A hot site consists of computers, devices, and connectivity necessary to rebuild a network exist, but without appropriate configuration.
When using SNMP with TLS, what port do agents receive requests on?
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?
When a device handles electrical signals improperly, usually resulting from a bad NIC, it is referred to by what term below?
When using DiffServ, what type of forwarding utilizes a minimum departure rate from a given node, which is then assigned to each data stream?
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?
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?
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?
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?
What makes up the first 6 bits of the 8-bit DiffServ field?
Differentiated Services Code Point (DSCP)