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The default port used for SMTP is:A . 23B . 25C . 80D . 8080View AnswerAnswer: B Explanation: SMTP by default uses TCP port 25.

You need to divide a network into three subnets. Which device should you use?A . HubB . BridgeC . RouterD . SegmenterView AnswerAnswer: C Explanation: You can use a router to divide your network into subnets.

Which protocol can be used to encrypt packets on the Internet?A . SNMPB . HTTPSC . TFTPD . HTTPView AnswerAnswer: B Explanation: HTTPS, which stands for Hypertext Transfer Protocol Secure, makes it more difficult for hackers, the NSA, and others to track users. The protocol makes sure the data isn't...

Which of the following is a Layer 2 WAN protocol?A . Point-to-Point Protocol (PPP)B . Simple Network Management Protocol (SNMP)C . Transmission Control Protocol (TCP)D . Internet Protocol (IP)View AnswerAnswer: A Explanation: WAN Protocols and Their Corresponding OSI Layers

The default port used for telnet is:A . 23B . 25C . 80D . 8080View AnswerAnswer: A Explanation: The telnet protocol is used to establish a connection to Transmission Control Protocol (TCP) port number 23, where a Telnet server application (telnetd) is listening.

Which of the following uses a tunneling protocol?A . InternetB . VPNC . ExtranetD . VLANView AnswerAnswer: B Explanation: Tunneling enables the encapsulation of a packet from one type of protocol within the datagram of a different protocol. For example, VPN uses PPTP to encapsulate IP packets over a public...

A computer that has an IP address of 169.254.0.1 cannot access the network. Which of the following services should you confirm is available?A . WINSB . DNSC . DHCPD . TFTPView AnswerAnswer: C Explanation:

What type of DNS record maps host names to addresses?A . Mail Exchanger (MX) DNS recordB . Service (SRV) DNS recordC . Host (A) DNS recordD . Canonical (CNAME) DNS recordView AnswerAnswer: C Explanation: An A or Address record (also known as a host record) links a domain to the...

Which of the following are features of DHCP? (Choose two.)A . IP address resolution to canonical namesB . Secure shell connectionsC . Address reservationD . Network file transferE . IP address exclusionView AnswerAnswer: CE Explanation: The Dynamic Host Configuration Protocol (DHCP) is a standardized network protocol used on Internet Protocol...

If a router is installed so that it separates a DHCP server from its clients, the clients will:A . Immediately lose connectivity to all segments.B . Be unable to obtain their leases from the server.C . Immediately lose connectivity to the local segment.D . Receive an immediate renewal of their...