ITN final exam 1 of 5

Which wireless technology has low-power and data rate requirements making it popular in home automation applications?

• ZigBee

• LoRaWAN

• 5G

• Wi-Fi

Answer explanation

ZigBee is an IEEE 802.15.4 wireless standard designed for creating personal-area networks. Low energy, power, and data rate requirements make Zigbee a popular protocol for connecting home automation devices.

Which layer of the TCP/IP model provides a route to forward messages through an internetwork?

• application

• network access

• internet

• transport

Answer explanation

The OSI model network layer corresponds directly to the internet layer of the TCP/IP model and is used to describe protocols that address and route messages through an internetwork.

Which type of server relies on record types such as A, NS, AAAA, and MX in order to provide services?

• email

• file

• DNS

• web

Answer explanation

A DNS server stores records that are used to resolve IP addresses to host names. Some DNS record types include the following:

A – an end device IPv4 address

NS – an authoritative name server

AAAA – an end device IPv6 address

MX – a mail exchange record

What service is provided by DNS?

• Resolves domain names, such as cisco.com, into IP addresses.

• A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.

• Allows for data transfers between a client and a file server.

• Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.

A client packet is received by a server. The packet has a destination port number of 110. What service is the client requesting?

• DNS

• POP3

• DHCP

• SMTP

What command can be used on a Windows PC to see the IP configuration of that computer?

• show ip interface brief

• ping

• show interfaces

• ipconfig

What characteristic describes a virus?

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

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

• the use of stolen credentials to access private data

• malicious software or code running on an end device

The IP address of which device interface should be used as the default gateway setting of host H1?

• R1: S0/0/0

• R2: S0/0/1

• R1: G0/0

• R2: S0/0/0

Answer explanation

The default gateway for host H1 is the router interface that is attached to the LAN that H1 is a member of. In this case, that is the G0/0 interface of R1. H1 should be configured with the IP address of that interface in its addressing settings. R1 will provide routing services to packets from H1 that need to be forwarded to remote networks.

Match the network with the correct IP address and prefix that will satisfy the usable host addressing requirements for Network A

• 192.168.0.96 /27

• 192.168.0.128 /25

• 192.168.0.80/30

• 192.168.0.0 /26

Answer explanation

Network A needs to use 192.168.0.128 /25, which yields 128 host addresses.

Match the network with the correct IP address and prefix that will satisfy the usable host addressing requirements for Network B

• 192.168.0.96 /27

• 192.168.0.128 /25

• 192.168.0.80/30

• 192.168.0.0 /26

Answer explanation

Network B needs to use 192.168.0.0 /26, which yields 64 host addresses.