Chapter 1 - Short Answer Flashcards
- A network consists of 10 computers, all running Windows 7 Professional. One computer acts as a file server and serves up data to other computers on the network.
Which networking model does the network use?
P2P
- In Question 11, suppose one computer is upgraded from Windows 7 Professional to Windows Server 2012 R2.
Which networking model can the network now support that
it could not support without the upgrade?
The resources are managed by NOS through the centralized directory database in the client-server network model. This database helps in managing using one or more servers until they achieve similar type of installed NOS.
Thus, the model of the network that helps in providing support that cannot be done without up gradation is Client-Server network model.
- What is the name of the domain controller database that Windows Server 2012 R2
uses to store data about user access and resources on the network?
The database of the central directory that has information of the users and security of entire database is known as Active Directory (AD). Every user on network has domain-level account known as global account. This global account is provided by network administrator and stored at Active Directory. The user can log in to the network from any device, computer or network and access the Active Directory. This whole process is controlled by Active Directory Domain Services (ADDS).
Thus, the name of the domain controller database that Windows Server 2010 R2 uses for storing data about user access and resources on network is Active Directory.
- A network consists of seven computers and a network printer all connected directly to
one switch. Which network topology does this network use?
Star
- What is the fundamental distinction between a Layer 2 switch and a router?
A switch is part of local networks and router is part of two or more local networks.
The nodes present in local network can communicate directly with one another. The host on one LAN finds it difficult to communicate, manage and stand in the form a gateway between the networks without the help of routers connected with LAN.
- What is the fundamental distinction between a node and a host?
Host is any device or computer over the network that can host a resource like application or data. Node is any computer or device on network that can address over the network or internet. The client computer or server operates as both node or host but the router or switch does not host resources and generally, considered as node on the network.
- In Question 14, suppose a new switch is connected to the first switch by way of a network cable and three computers are connected to the new switch. Which network
topology is now used?
Star Bus (Hybrid)
- What is the fundamental distinction between a MAN and a WAN?
The fundamental distinction between MAN and WAN is that group of connected LANs at a same location like group of branches of a big company is called metropolitan area network (MAN) and the group LANs that spread over different locations is called wide area network (WAN). WAN can be linked between two local networks that are bound using routers.
- What is a message called that is delivered by TCP? What is a message called that is delivered by UDP? At which layer do the two protocols work?
Transport layer header addresses in order to receive application by number called port number. If the message is very large that cannot be transported over network, then transmission control protocol (TCP) is used for dividing into smaller messages called segments. The message in user datagram protocol (UDP) is known as datagram.
Thus, the message given by TCP is segment. The message delivered by UDP is datagram. The layer where protocol works is transport layer.
- Which type of address is used at the Transport layer to identify the receiving application?
Port number is one of the portions in Transport-layer protocol header indicating the origin and destination to the application-layer protocol, which helps in requesting data. Transport layer header addresses in order to receive application by number called port number.
Thus, the type of address used in transport layer for identifying the applications received is Port number.
- Is TCP or UDP normally used when streaming live video? Why?
Yes, UDP is normally used for streaming live video. Streaming means transfer of audio or video in one way.
- UDP is User datagram Protocol. UDP is transport layer protocol without connection that helps communicating with other devices efficiently through small parts of data.
- DNS is Domain Name System. DNS is an application layer protocol helps in resolving computer and domain names for their IP address.
- DNS makes use of UDP transport layer protocol.
- UDP used for broadcasting like streaming video or audio over the web such that the delivery is not very much important as in fast transmission.
- It offers reduced latency over the reliability of TCP protocol.
- It is the fastest protocol over TCP.
- At the Network layer, what is a message called?
Packetization is the process of bundling data into packets as per the specific protocol. Internet protocol (IP) adds the network layer header to the segment or datagram and entire network layer message called packets.
Thus, the message at the network layer is called packet.
- What is the primary protocol used at the Network layer?
IP is internet protocol. IP address is 32 bit dotted decimal address used by internet for finding the details of the host, location of host and network of the host at internetwork layer.
Thus, the primary protocol that is used at the network layer is Internet Protocol (IP).
- At the Network layer, what type of address is used to identify the receiving host?
The network layer header helps in identifying the hosts of sender or receiver with the help of IP address. IP address is the address provided to every node on the network that can be used by network layer identifying them on the internet or network. Thus, the type of address used for identifying the receiving hosts at network layer is IP address.
- What is a PDU called at the Link layer?
Frame
- At the Link layer, which type of network address is used to identify the receiving node?
MAC address,
- Why is it important to wear an ESD strap when installing a server in a rack?
The importance of wearing an ESD strap for installing a server in a rack is to eliminate any ESD between user and chassis along with components. It helps in protecting against static and electric shocks.
- A computer is unable to access the network. When you check the LED lights near the
computer’s network port, you discover the lights are not lit. Which layer of the OSI
model are you using to troubleshoot this problem? At which two layers does the network adapter work?
Physical layer is the Layer 1 that helps in converting bit into signals and defines connectors and media. Data Link layer is the layer 2 of the OSI model that is helps in managing the access to the network and delivers frames of data in order to receive or send intermediate device like router.
Thus, the layer of the OSI model that helps in troubleshooting the problem is physical layer. The two layers that the network adapter operates are Data link layer and physical layer.
- A user complains that he cannot access a particular Web site, although he is able to
access other Web sites. At which layer of the OSI model should you begin troubleshooting the problem?
Application layer is Layer 7 in the OSI model that helps in providing access to network resources. The complaints about the unable to access a specific website even though accessing other website can be solved using application layer of OSI model.
Thus, the OSI model layer that helps trouble shooting the problem is application layer.
- A user complains that Skype drops her videoconference calls and she must reconnect.
At which layer of the OSI model should you begin troubleshooting? Which OSI layer is
responsible for not dropping the Skype connection?
Application layer is Layer 7 in the OSI model that helps in providing access to network resources. The complaints about the unable to access a specific website even though accessing other website can be solved using application layer of OSI model. Session layer is the layer 5 of OSI model that helps in managing the ongoing conversation between computers.
Thus, the layer of OSI model for troubleshooting is application layer. The OSI layer responsible for not dropping the Skype connection is session layer.
