Networks

72 questions · Fundamental Engineering · 51–72

Apr 2020 · Question 33

Which of the following is an appropriate characteristic of IPv6 addresses?

a)All addresses are global.b)An address consists of 96 bits.c)There are several address representations, one of which uses a hexadecimal string with every four digits (i.e., 16 bits) separated by a colon “:”.d)There is a one-to-one correspondence between all IPv6 addresses and all IPv4 addresses.

Apr 2020 · Question 34

There is a PC whose IP address and subnet mask are shown below. Which of the following is the network address of this PC?

IP address:10.170.70.19Subnet mask:255.255.255.240

a)10.170.70.0b)10.170.70.16c)10.170.70.31d)10.170.70.255

Apr 2020 · Question 35

Which of the following is an Internet standard that extends the format of email messages to support non-ASCII text as well as audio, video, and images?

a)HTMLb)MHSc)MIMEd)SMTP

Oct 2020 · Question 30

Approximately how many seconds is required to transmit a file of 10⁶ bytes via a 64-kbit/s communication line? Here, the transmission efficiency of the line is 80%.

a)19.6b)100c)125d)156

Oct 2020 · Question 31

Which of the following is a device that connects multiple LANs by relaying data through the protocol information of the data link layer of the OSI basic reference model?

a)Bridgeb)Gatewayc)Repeaterd)Router

Oct 2020 · Question 33

What is the broadcast address of a network to which the IP address 192.168.57.123/22 belongs?

a)192.168.55.255b)192.168.57.255c)192.168.59.255d)192.168.63.255

Oct 2019 · Question 32

Which of the following is the device that operates only at the physical layer of the OSI model?

a)Bridgeb)Repeaterc)Routerd)Switch

Oct 2019 · Question 33

Which of the following is the maximum theoretical data rate (in Mbps) achievable in the IEEE 802.11n network?

a)11b)54c)248d)600

Oct 2019 · Question 34

Which of the following is an architecture that decouples the network control and forwarding functions, enabling the network control to become directly programmable and the underlying infrastructure to be abstracted for applications and network services?

a)Cloud computingb)Internet of thingsc)Network function virtualizationd)Software-defined networking

Oct 2019 · Question 36

Which of the following is an e-mail header field that is removed during the message transfer using SMTP?

a)Bccb)Datec)Receivedd)X-Mailer

Apr 2019 · Question 33

Which of the following is the network routing and addressing mechanism that is used in IPv6 but not in IPv4?

a)Anycastb)Broadcastc)Multicastd)Unicast

Apr 2019 · Question 34

In an IPv4 network with subnet mask 255.255.255.224, what is the maximum number of host addresses assigned?

a)14b)20c)26d)30

Apr 2019 · Question 35

Which of the following is a protocol that uses TCP as its transport layer protocol?

a)DHCPb)SNMPc)TELNETd)TFTP

Oct 2018 · Question 33

In the OSI basic reference model, which of the following is the layer where bridges operate?

a)Application layerb)Network layerc)Datalink layerd)Transport layer

Oct 2018 · Question 35

Which of the following is an appropriate explanation of SDN (Software-Defined Networking) that uses OpenFlow?

a)It is a business analysis and visualization software technology that uses visual means such as data flow diagrams and activity diagrams to discover problems in business processes.b)It is a network technology that logically decouples the functions for data transfer and route control, and is implemented with a combination of network devices specialized for data transfer and software-based route control.c)It is an Internet of Things (IoT) technology that uses RFID, and is a software architecture for the optimization of logistics networks.d)It is an optimum relocation of servers on a network in order to efficiently deliver a range of software content such as music, videos, and online games over the Internet.

Oct 2018 · Question 36

As shown below, multiple PCs are connected to the home network and they have access to the Internet through FTTH, and a global IP address is assigned to the WAN interface of device A. Which of the following is the function of device A that enables the PCs to use the Internet with this global IP address?

a)DHCPb)NAPT (IP Masquerade)c)Packet filteringd)PPPoE

Apr 2018 · Question 31

Which of the following TCP/IP protocols is used to assign IP addresses dynamically?

a)ARPb)DHCPc)RIPd)SMTP

Apr 2018 · Question 32

In a TCP/IP network hierarchical model, what is the name for Equipment A that connects two LAN segments at the Internet Layer?

a)Bridgeb)Repeater hubc)Routerd)Switching hub

Apr 2018 · Question 33

Which of the following is a pair of IP addresses belonging to the same subnet, when the subnet mask is 255.255.255.240?

a)192.168.1.14 and 192.168.1.17b)192.168.1.17 and 192.168.1.29c)192.168.1.29 and 192.168.1.33d)192.168.1.33 and 192.168.1.49

Apr 2018 · Question 34

Which of the following delivery models does an ARP response use?

a)Anycastb)Broadcastc)Multicastd)Unicast

Apr 2018 · Question 35

A PC and a web server are communicating via HTTP. When a request packet is sent from the PC to the web server, which of the following combinations of port numbers does the response packet have? Here, the source and the destination port numbers of the request packet are 50001 and 80 respectively.

Source (web server) port numberDestination (PC)port number

a)8050001b)5000180c)A number allocated on the web server, other than 80 and 5000180d)A number chosen by the web server other than 80 or 5000150001

Apr 2018 · Question 45

Which of the following is an appropriate reason why VLANs are used?

a)In order to obtain an IP addressb)In order to reduce network trafficc)To remotely access the intranet from a public networkd)To use a virtual memory system