Lesson 5: Configuring Network Addressing and Internet Connections

A network technician is checking the records to ensure all the host names match up with the proper IP addresses for the network. What records is the technician checking? (Select all that apply.) A. A B. MX C. FQDN D. AAAA

A. A An address (A) record is a resource record that resolves a host name to an IPv4 address. Network technicians can create and update resource records manually (statically) D. AAAA An AAAA record is a resource record on a DNS server that resolves a host name to an IPv6 address. Client and server computers on the network can generate resource records dynamically.

A network technician is setting static IPv4 addresses on servers. Which settings would be considered optional for ensuring proper communications within a local area network? (Select all that apply.) A. The gateway B. The alternate DNS C. IP address D. Subnet mask

A. The gateway The gateway parameter is the IPv4 address of a router and is the IP address to which packets destined for a remote network should go by default. This will be changed for groups of locally connected devices. B. The alternate DNS The Domain Name System (DNS) and alternate DNS servers provide resolution of host and domain names to their IP addresses and are essential for locating resources on the internet.

An application uses Transmission Control Protocol (TCP) as it requires data to make it to the destination 100% intact. Which of the following are functions of this protocol? (Select all that apply.) A. Uses SYN/ACK packets. B. Uses TFTP. C. Uses negative acknowledgment. D. Uses FIN.

A. Uses SYN/ACK packets. TCP establishes a connection between the sender and recipient using a handshake sequence of SYN, SYN/ACK, and ACK packets. C. Uses negative acknowledgment. TCP allows the receiver to send a negative acknowledgment (NACK) to force retransmission of a missing or damaged packet. D. Uses FIN. TCP allows the graceful termination of a session using a FIN handshake. The main drawback is that this connection information requires multiple header fields.

An application developer wants to ensure packets arrive at the destination in the correct order and none are lost when an application communicates across the network. Which protocol will the application developer use? A. UDP B. TCP C. IP D. DNS

B. TCP The Transmission Control Protocol (TCP) can identify and recover from lost or out-of-order packets. Failing to receive a packet or processing it incorrectly can cause serious data errors.

A network technician is configuring hosts to request IP configuration from a server. What protocol is the technician configuring? A. HTTPS B. SSH C. DHCP D. TFTP

C. DHCP The technician is configuring Dynamic Host Configuration Protocol (DHCP) which is a protocol used by clients to request IP configuration information from a server.

A network technician must allow employee computers to securely connect to the corporate network from alternate locations. What is the best method for the technician to use? A. DMARC B. DHCP scope C. VPN D. VLAN

C. VPN A virtual private network (VPN) enables hosts to connect to the LAN from locations other than the site by connecting to the local network via a secure remote access server.

A networking student is learning about IP addressing and discovers which of the following facts are NOT true regarding IPv6? A. Divided into two main parts. B. Will replace IPv4. C. Expressed in hexadecimal notation. D. Expressed in dotted decimal notation.

D. Expressed in dotted decimal notation. To make IPv4 addresses easier to use, they are in dotted decimal notation. IPv6 addresses are in hexadecimal notation.

A company hires a network technician who is reviewing the network setup documentation. The technician sees that the company has fiber optic cable running all the way up to the building. This represents what type of connection? A. FTTC B. VDSL C. ONT D. FTTP

D. FTTP A fiber to the premises (FTTP) internet connection means that the service provider's fiber optic cable runs all the way to the customer's building.

A network technician is purchasing a digital subscriber line (DSL) service for a business that transfers large amounts of data back and forth between branches. What is the best connection type for the business? A. ADSL B. ISP C. PSTN D. Symmetric DSL

D. Symmetric DSL Symmetric versions of DSL offer the same uplink and downlink speeds and are of more use to businesses and for branch office links, where more data passes upstream than with normal internet use.

A network technician is purchasing cellular phones for people who are travelling to a rural area and wants to make sure they will work with the most networks, as the areas do not have the latest cellular technology. What type of phones will help the technician accomplish this? A. CDMA B. GSM C. Firewall D. Router

B. GSM Global System for Mobile Communication (GSM)-based phones allow subscribers to use a removable subscriber identity module (SIM) card to use an unlocked handset with their chosen network provider.