Network+ Guide to Networking CH:8-15
If your wireless stations are configured to perform passive scanning, what do they need from an access point to initiate association?
A beacon frame
The most popular mail server programs are Sendmail and ____.
Microsoft Exchange Server
To transmit and receive signals to and from multiple nodes in a three-story office building, what type of antenna should an access point use?
Omnidirectional
IMAP (Internet Message Access Protocol) is a mail retrieval protocol that was developed as a more sophisticated alternative to ____.
POP3
Which of the following are required when logging on to a Windows NT Server? (Choose two.)
Password Username
When a mobile WLAN user roams from access point A's range into access point B's range, what does it do automatically to maintain network connectivity?
Reassociate with access point B
What part of a cellular network manages handoff?
The base station
Wireless broadband solution defined in the IEEE 802.16 standard is also referred to as:
WiMAX
As the network manager for a small business, you have been asked to evaluate high-speed, packet-switched wireless data services that your company's users can use at their desks, in their cars, and at their homes within your metropolitan area. Which two of the following meet those criteria, and are therefore candidates for evaluation?
WiMAX 2 LTE
When you use the mtr command to assess the path from your office workstation to a server on your company's WAN that's located in Spain, what is the first hop the mtr command will display?
Your default gateway's IP address
In ____ scanning, the station transmits a special frame, known as a probe, on all available channels within its frequency range.
active
SSID is a part of:
beacon frame
In ____ addressing, the network information portion of an IPv4 address is limited to the first 8 bits in a Class A address.
classful
On network diagrams, the Internet is frequently depicted as a ____.
cloud
The gateways that make up the Internet backbone are called ____ gateways
core
The gateways that make up the Internet backbone are called ____ gateways.
core
The ____ gateway is the gateway that first interprets its outbound requests to other subnets, and then interprets its inbound requests from other subnets.
default
The term "site survey" refers to:
determining obstacles for a planned wireless network deployment
In ____, a wireless signal splits into secondary waves when it encounters an obstruction
diffraction
Suppose your office's only DNS server was down, and you wanted to view the DNS address record for your company's domain. Which of the following TCP/IP utilities would allow you to do this?
dig
Which of the following tools provides capabilities similar to nslookup?
dig
To establish a satellite Internet connection, each subscriber must have a ____.
dish antenna
IMAP4 uses:
C) TCP port 143
Simple Mail Transfer Protocol (SMTP) runs on:
C) TCP port 25
In a ____ VPN, tunnels connect multiple sites on a WAN.
C) site-to-site
In the 802.11 standard, IEEE specifies what type of access method?
CSMA/CA
____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.
Channel bonding
Which two of the following techniques help to reduce overhead in 802.11n wireless transmission?
Channel bonding Frame aggregation
A class ____ network class is reserved for special purposes.
D
Which netstat parameter displays the process ID for each connection?
D) -o
____ refers to dialing directly into a private network's or ISP's remote access server to log on to a network.
D) Dial-up networking
Simple Mail Transfer Protocol (SMTP):
D) is used for relaying e-mail messages between mail servers
A directional antenna issues wireless signals along a(n) ____ direction.
single
Which netstat parameter displays all connections and listening ports?
-a
Which nbtstat parameter lists local NetBIOS names?
-n
Which netstat parameter displays the routing table?
-r
Which netstat parameter displays separate lists of statistics for each protocol?
-s
You have decided to use PAT on your small office network. At minimum, how many IP addresses must you obtain from your ISP in order for all five clients in your office to be able to access servers on the Internet?
1
Your workstation's IP address is 10.35.88.12, and your supervisor's workstation's IP address is 10.35.91.4. When you send data from your workstation to your supervisor's workstation, what is the most likely IP address of the first default gateway that will accept and interpret your transmission?
10.35.88.1
In the case of connecting two WLANs, access points could be as far as ____ feet apart
1000
In the case of connecting two WLANs, access points could be as far as ____ feet apart.
1000
The standard message format specified by SMTP allows for lines that contain no more than ____ ASCII characters.
1000
The result from ANDing 11001111 with 10010001 is ____.
10000001
You have enabled NAT on your small office's router. The router's private network IP address is 198.162.6.1. Which of the following IP addresses is the most likely to be automatically assigned to one of the workstations that uses this router as its default gateway?
192.168.6.6
What frequency band is used by 802.11b, 802.11g, and 802.11n?
2.4 GHz
Your company has leased a Class C network whose network ID is 205.61.128.0. You want to create 16 subnets within this network. One of the subnets will have an extended network prefix of 205.61.128.64. What will be the broadcast address for this subnet? (Hint: If you know the number of hosts per subnet, you can easily determine the broadcast address.)
205.61.128.71
Most satellites circle the Earth ____ miles above the equator in a geosynchronous orbit.
22,300
If you subdivide your Class B network into 254 subnets, what is the maximum number of hosts you can assign to any single subnet?
254
If you worked on a network that could not interpret classless addressing, and your network ID was 145.27.0.0, what is the theoretical maximum number of different subnets you could create on this network?
254
Convert the following subnet mask into its dotted-decimal equivalent: 11111111 11111111 11111000 00000000.
255.255.248.0
What is the default subnet mask for a Class C network?
255.255.255.0
Within a classful addressing, ____ is the default subnet mask for a Class C address.
255.255.255.0
As a networking consultant, you've been asked to help expand a client's TCP/IP network. The network administrator tells you that the network ID is subnetted as 185.27.54.0/26. On this network, how many bits of each IP address are devoted to host information?
6
Which of the following is a set of standards for wireless networks?
802.11
____ is the least popular WLAN standard.
802.11a
Which of the following can operate at 5 GHz frequency range? (Select 2)
802.11a 802.11n
Which of the following wireless standards offers highest connection speeds?
802.11n
Which of the following wireless standards offers the highest backward compatibility?
802.11n
Your office currently runs a mix of 802.11b and 802.11g clients. Rumor has it thatyour company is about to merge with another company that uses a different wirelesstechnology. Which of the following would be compatible with what your WLANcurrently runs?
802.11n
____ may use either the 2.4-GHz or 5-GHz frequency range
802.11n
Which of the following 802.11 transmission requirements contributes to its inefficiency?
A destination node must issue an acknowledgment for every packet that is received intact.
Which two of the following are benefits of using IMAP4 relative to POP3?
A) It enables multiple users to easily share a central mailbox. D) It allows users to review and delete mail without downloading it from the mail server.
You work second shift and share a desktop workstation with your colleagues who work on the first and third shifts. Each of you has a separate virtual machine on the workstation. When your third-shift coworker installs a new program on his VM, it causes the machine's operating system to stop working. What happens as a consequence?
A) Nothing changes for your VM.
How must a physical NIC be configured so that it can connect its host's VMs to multiple VLANs?
C) As a trunk
You have created multiple virtual machines on your workstation to test different unified communications programs. You want these machines to be available to your IT colleagues for testing, but you do not want the traffic generated by their use to interfere with routine business LAN traffic. Meanwhile, on another workstation a coworker has installed additional communications programs for review. You decide to create a new VLAN devoted to software evaluation. Where do you add your coworker's virtual machines to the new VLAN?
A) On your friend's host workstation, where the virtual machines reside
In classful addressing, the Class B IPv4 address network ID is located in the ____.
A) first 16 bits
If you know that your colleague's TCP/IP host name is JSMITH, and you need to find out his IP address, which of the following commands should you type at your shell prompt or command prompt?
A) nslookup jsmith
Your organization is expanding and plans to lease 3000 square feet of space in a nearby building. Your supervisor asks you to conduct a site survey of the space. If conducted properly, which of the following will your site survey reveal?
All of the above
An example of a popular client email software is ____.
B) Microsoft Outlook
Which of the following commands produce the same result (display routing table)? (Select 2)
B) route print E) netstat -r
In the case of dial-up networking, the term ____ refers to a modem.
B) serial connection
Which of the following will help an access point's transmissions reach farther?
Boosting its signal strength
On your Linux workstation, you open a terminal window and type at the commandprompt iwconfig eth0 key 5c00951b22. What have you done?
Established the credentials the wireless interface will use to communicate securely with the access point
____ is an 802.11n network feature allowing the combination of multiple frames into one larger frame
Frame aggregation
Which two of the following techniques help to reduce overhead in 802.11n wireless transmission
Frame aggregation Channel bonding
What Network layer protocol does the traceroute utility use to obtain its information about paths between a source and destination?
ICMP
You are setting up a WLAN for an insurance agency. The network includes 32 clients, three printers, two servers, and a DSL modem for Internet connectivity. What type of WLAN architecture would best suit this office?
Infrastructure
____ is a significant problem for wireless communications because the atmosphere is saturated with electromagnetic waves
Interference
Which satellites transmit and receive signals in the 12 to 18 GHz band?
Ku-
Which of the following wireless technologies boasts the highest maximum theoretical throughput?
LTE
Suppose you work for a telecommunications carrier who is looking into providingWiMAX in a suburb of a large city. A colleague suggests that your company reservelicensed frequencies from the FCC for your service. Why?
Licensed frequencies will suffer less interference than unlicensed frequencies.
Suppose a user on your office network has changed the channel on which his wirelessNIC communicates. Assuming the wireless connection is his only access to the LAN,what will happen when he next tries to send an e-mail?
The e-mail program will respond with a message indicating it could not connect to the mail server.
You're working on a school district's 802.11n WLAN. Within each school, severalaccess points serve students, teachers, and administrators. So that users can move about the school with their laptops and not lose network connectivity, each of the access points must share which of the following?
The same ESSID
____ is the most widely implemented virtualization software today.
VMware
____ is an open source system designed to allow one workstation to remotely manipulate and receive screen updates from another workstation.
VNC
____ desktops are desktop operating environments hosted virtually, on a different physical computer from the one with which the user interacts.
Virtual
VPNs can be classified based on the kinds of ____ they connect.
endpoints
In ____ wireless systems, the transmitting antenna focuses its energy directly toward the receiving antenna which results in a point-to-point link.
fixed
In wireless communication, to exchange information, two antennas must be tuned to the same ____.
frequency
Each VM is known as a ____.
guest
An administrator can discover the host name assigned to a client by using the ____ utility.
hostname
If intermittent and difficult-to-diagnose wireless communication errors occur, ____ might be the culprit.
interference
Which of the following tools is used for querying DNS server to obtain domain name or IP address mapping?
nslookup
A program similar to mtr, ____, is available as a command-line utility in Windows operating systems.
pathping
Because the octets equal to 0 and 255 are ____, only the numbers 1 through 254 can be used for host information in an IPv4 address.
reserved
POP3 (Post Office Protocol, version 3) relies on TCP and operates over port ____.
route
Which of the following commands reveals the default gateway addresses for all the hosts to which a router is connected?a. b. c. d.
route
Which of the following commands allows you to view the routing table on your Linux workstation? (Choose all that apply.)
route E) netstat -r
What does the term multiple-input and multiple-output (MIMO) refer to
use of multiple antennas for improved performance
What does the term multiple-input and multiple-output (MIMO) refer to?
use of multiple antennas for improved performance