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A network administrator is adding a new LAN to a branch office. The new LAN must support 61 connected devices. What is the smallest network mask that the network administrator can use for the new network?

• • 255.255.255.240

• • 255.255.255.224

• • 255.255.255.192

• • 255.255.255.128

What characteristic describes a DoS attack?

• • the use of stolen credentials to access private data

• • a network device that filters access and traffic coming into a network

• • software that is installed on a user device and collects information about the user

• • an attack that slows or crashes a device or network service

What service is provided by SMTP?

• • Allows clients to send email to a mail server and the servers to send email to other servers.

• • Allows remote access to network devices and servers.

• • Uses encryption to provide secure remote access to network devices and servers.

• • An application that allows real-time chatting among remote users.

Which scenario describes a function provided by the transport layer?

• • A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network.

• • A student is playing a short web-based movie with sound. The movie and sound are encoded within the transport layer header.

• • A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.

• • A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.

Refer to the exhibit. Host B on subnet Teachers transmits a packet to host D on subnet Students. Which Layer 2 and Layer 3 addresses are contained in the PDUs that are transmitted from host B to the router?

• Layer 2 destination address = 00-00-0c-94-36-ab
  Layer 2 source address = 00-00-0c-94-36-bb
  Layer 3 destination address = 172.16.20.200
  Layer 3 source address = 172.16.10.200

• Layer 2 destination address = 00-00-0c-94-36-dd
  Layer 2 source address = 00-00-0c-94-36-bb
  Layer 3 destination address = 172.16.20.200
  Layer 3 source address = 172.16.10.200

• Layer 2 destination address = 00-00-0c-94-36-cd
  Layer 2 source address = 00-00-0c-94-36-bb
  Layer 3 destination address = 172.16.20.99
  Layer 3 source address = 172.16.10.200

• Layer 2 destination address = 00-00-0c-94-36-ab
  Layer 2 source address = 00-00-0c-94-36-bb
  Layer 3 destination address = 172.16.20.200
  Layer 3 source address = 172.16.100.200

  
  

What does the term “attenuation” mean in data communication?

• • strengthening of a signal by a networking device

• • leakage of signals from one cable pair to another

• • time for a signal to reach its destination

• • loss of signal strength as distance increases

Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?

• • The entire command, configure terminal, must be used.

• • The administrator is already in global configuration mode.

• • The administrator must first enter privileged EXEC mode before issuing the command.

• • The administrator must connect via the console port to access global configuration mode.

Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)

• • TCP

• • IP

• • UDP

• • POP

• • DNS

A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework?

• • automation

• • accounting

• • authentication

• • authorization

What three requirements are defined by the protocols used in network communcations to allow message transmission across a network? (Choose three.)

• • message size

• • message encoding

• • connector specifications

• • media selection

• • delivery options