Networks
72 questions · Fundamental Engineering · 1–50
In IPv4, which of the following is a description concerning the NAT function of a router that connects some computers to the Internet?
Which of the following is a data link layer function that enables a receiver to control the amount of data a sender transmits?
In telecommunication, which of the following is a standard for wireless broadband communication for mobile devices and data terminals?
Which of the following is a mechanism used to prioritize traffic based on its importance and minimize network latency for network applications?
PC5 has been newly added to the network. It wants to send data to PC4 using SSH protocol. It must resolve the MAC address of PC4 from its IP address before sending the data. Which of the following is the destination MAC address that PC5 will use in ARP request?
Between LAN systems that are different from the transport layer upward in the OSI basic reference model, which of the following is a device that performs protocol conversion?
Which of the following is an Internet standard that extends the format of email header fields to handle not only text messages but also audio and image files?
Which of the following is the most appropriate information for a router to determine the destination of an incoming packet?
In the OSI model, which of the following is the layer that is responsible for routing datagrams between hosts utilizing IP addresses across one or more networks?
Which of the following is an appropriate explanation regarding Address Resolution Protocol (ARP)?
An administrator of a small network is testing the new network. Which of the following is the correct combination of the network management tools to be inserted in the blanks below?
The administrator first tests reachability of a remote host using A, and determines the path that packets take to the destination with B
Which of the following is an appropriate description of a device that connects LANs?
Which of the following is a protocol to gather information on network components to manage and troubleshoot the network?
Which of the following is the way of using a phone to supply an Internet connection to other devices, such as a tablet or laptop computer over either Wi-Fi or Bluetooth?
Which of the following is the network device that makes a forwarding decision on the basis of the destination MAC address in the frame header?
Which of the following is the broadcast address of the network 192.168.10.0/23?
Which of the following is the name of a communication standard that is used in mobile phone networks and has the three characteristics described below?
Which of the following is the network utility that is used to check detailed TCP connection information of the host?
Which of the following is a feature of a switching hub (layer 2 switch) network device?
When a PC connected to a LAN is starting up, which of the following protocols is used to automatically assign an IP address to the PC?
In the same subnet, which of the following is the devices that will receive the data when the destination address is set to 255.255.255.255?
In a TCP/IP network, which of the following is a protocol used to match the clocks of the server and the client?
As for the use of e-mails over the Internet, which of the following is a standard that extends the header field and can handle not only text but also audio and images?
In an IP network consisting of four (4) hosts, two (2) L2 switches, and a router shown below, a packet is transmitted from PC01 to PC03. Which of the following is an appropriate combination of the source and destination addresses of this packet when it leaves Switch1?
Which of the following is a TCP/IP protocol that is used to find the corresponding MAC address from an IP address?
Which of the following is the subnet mask corresponding to an IP address in slash notation, 192.168.22.31/27?
Multiple PCs are connected to the Internet with FTTH. The WAN interface of device A has a single global IP address allocated to it. Which of the following is the function of device A that enables these PCs to connect to the Internet by sharing the global IP address?
Audio data of 2.4 Mbytes encoded at 192 kbit/s is to be downloaded and played back without interruptions over a network with a communication speed of 128 kbit/s. What is the minimum number of seconds required as the data buffering time before the start of playback?
There exists a system that connects a head office to a factory via a leased line and sends form data. The size of each form is 2,000 bytes, and header data totaling 400 bytes is attached to every two (2) forms to be sent through this system. On average, 100,000 forms per hour are generated. When the line speed is 1 Mbit/s, what is the line’s utilization rate in percentage?
In IPv4, what is the maximum number of IP addresses that can be assigned to hosts in the network of 172.16.64.0/23? Here, the decimal number after the slash (/) is the number of bits used for the network prefix.
Which of the following is the broadcast address of the network with the address 192.168.128.0/26? Here, the decimal number after the slash (/) is the number of bits used for the network prefix.
Which of the following is an Internet standard that is used to convert IP addresses to the corresponding MAC addresses?
Which of the following is the response time when a client and server at different locations communicate under the conditions below? Here, the response time is in seconds and starts from the moment the client sends a message until a response is received from the server. 1 MB is 106 bytes. The propagation delay between the client and server can be ignored.
[Conditions]
Which of the following is an appropriate transmission operation of a node connected to a CSMA/CD LAN?
In a TCP/IP environment, which of the following is a protocol for synchronizing the clocks of multiple computers with that of a time server?
In the OSI basic reference model, which of the following is a network device that operates at the network layer?
Which of the following is a mechanism that enables multiple terminals to have private addresses different from each other to connect to the Internet by sharing a single global IP address?
In TCP/IP, which of the following is an application layer protocol that enables a server to automatically configure its clients with network information such as IP addresses, the subnet mask, and the default gateway address?
Which of the following is an appropriate explanation of Software-Defined Networking (SDN) that uses OpenFlow?
Which of the following technologies is the most suitable to divide the whole company network into networks by department?
Which device performs protocol conversion between different types of networks, functioning at the layers of transport and above in the OSI basic reference model?
Locations A and B, both on the ground, communicate via a geostationary satellite at an altitude of about 36,000 km. When the distance between each location and the satellite is 37,500 km, and the delay caused by the relay at the satellite is 10 milliseconds, what is the total delay in seconds for the data sent from A to arrive at B? Here, the propagation speed of radio waves is 3×108 m per second.