Chapter 11 It's a Network

Which two statements about a service set identifier (SSID) are true? (Choose two.) Responsible for determining the signal strength. Used to encrypt data sent across the wireless network. All wireless devices on the same WLAN must have the same SSID. Consists of a 32-character string and is not case sensitive. Tells a wireless device to which WLAN it belongs.

All wireless devices on the same WLAN must have the same SSID Tells a wireless device to which WLAN it belongs

What is a security feature of using NAT on a network? Denies all packets that originate from private IP addresses. Allows internal IP addresses to be concealed from external users. Denies all internal hosts from communicating outside their own network. Allows external IP addresses to be concealed from internal users.

Allows internal IP addresses to be concealed from external users.

When should an administrator establish a network baseline? When the traffic is at peak in the network. When there is a sudden drop in traffic. At the lowest point of traffic in the network. At regular intervals over a period of time.

At regular intervals over a period of time.

Which statement is true about CDP on a Cisco device? To disable CDP globally, the no cdp enable command in interface configuration mode must be used. The show cdp neighbor detail command will reveal the IP address of a neighbor only if there is Layer 3 connectivity. CDP can be disabled globally or on a specific interface. Because it runs at the data link layer, the CDP protocol can only be implemented in switches.

CDP can be disabled globally or on a specific interface.

What do WLANs that conform to IEEE 802.11 standards allow wireless user to do? Use wireless mice and keyboards. Create a one-to-many local network using infrared technology. Use cell phones to access remote services over very large areas. Connect wireless hosts to hosts or services on a wired Ethernet network.

Connect wireless hosts to hosts or services on a wired Ethernet network.

A network administrator has determined that various computers on the network are infected with a worm. Which sequence of steps should be followed to mitigate the worm attack? Containment, quarantine, treatment, and inoculation. Treatment, quarantine, inoculation, and containment. Inoculation, containment, quarantine, and treatment. Containment, inoculation, quarantine, and treatment.

Containment, inoculation, quarantine, and treatment.

Which type of network attack involves the disabling or corruption of networks, systems, or services? Access attacks Denial of service attacks Reconnaissance attacks Malicious code attacks

Denial of service attacks

How should traffic flow be captured in order to best understand traffic patterns in a network? When it is from a subset of users. During low utilization times. When it is on the main network segment only. During peak utilization times.

During peak utilization times.

If a configuration file is saved to a USB flash drive attached to a router, what must be done by the network administrator before the file can be used on the router? Edit the configuration file with a text editor. Use the dir command from the router to remove the windows automatic alphabetization of the files on the flash drive. Convert the file system from FAT32 to FAT16. Change the permission on the file from ro to rw.

Edit the configuration file with a text editor.

A network administrator checks the security log and notices there was unauthorized access to an internal file server over the weekend. Upon further investigation of the file system log, the administrator notices several important documents were copied to a host located outside of the company. What kind of threat is represented in this scenario? Identify theft Data loss Information theft Disruption of service

Information theft

Which two actions can be taken to prevent a successful attack on an email server account? (Choose two.) Never send the password through the network in a clear text. Never use passwords that need the Shift key. Never allow physical access to the server console. Limit the number of unsuccessful attempts to log in to the server. Only permit authorized access to the server room.

Never send the password through the network in a clear text. Limit the number of unsuccessful attempts to log in to the server.

Which protocol supports rapid delivery of streaming media? TCP RTP SNMP PoE

RTP

Which network design consideration would be more important to a large corporation than to a small business? Internet router Redundancy Firewall Low port density switch

Redundancy

A ping fails when performed from router R1 to directly connected router R2. The network administrator then proceeds to issue the show cdp neighbors command. Why would the network administrator issue this command if the ping failed between the two routers? The network administrator wants to verify the IP address configured on router R2. The network administrator suspects a virus because the ping command did not work. The network administrator wants to determine if connectivity can be established from a non-directly connected network. The network administrator wants to verify Layer 2 connectivity.

The network administrator wants to verify Layer 2 connectivity.

What is the purpose of issuing the commands cd nvram: then dir at the privilege exec mode of a router? To list the content of the NVRAM. To clear the content of the NVRAM. To copy the directories from the NVRAM. To direct all new files to the NVRAM.

To list the content of the NVRAM

Which two statements characterize wireless network security? (Choose two.) Wireless networks offer the same security features as wired networks. An attacker needs physical access to at least one network device to launch an attack Using the default IP address on an access point makes hacking easier. Some RF channels provide automatic encryption of wireless data. With SSID broadcast disabled, an attacker must know the SSID to connect.

Using the default IP address on an access point makes hacking easier. With SSID broadcast disabled, an attacker must know the SSID to connect.

Fill in the blank. ____defines the protocols and technologies that implement the transmission of voice data over an IP network.

VoIP

Which WLAN security protocol generates a new dynamic key each time a client establishes a connection with the AP? PSK WPA EAP WEP

WPA

Which command will backup the configuration that is stored in NVRAM to a TFTP server? copy tftp running-config copy startup-config tftp copy running-config tftp copy tftp startup-config

copy startup-config tftp

Fill in the blank. The show ____ command provides information about the amount of available and free flash memory and its permissions for reading or writing data.

file systems

Fill in the blank. The____command that is issued on a router is used to verify the value of the software configuration register.

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