CTI-120: Networking Fundamentals

CIR (Committed Information Rate)

A ________ is the guaranteed certain amount of information provided by a circuit or line.

Host

A ___________ is a single computer or device that connects to a TCP/IP network?

Routing

A layer 3 switch is so named because it provides what functionality that layer 2 switches do not provide?

Ad-hoc

A(n) _______________ network is when two or more wireless clients communicate directly with each other, without the need for a WAP.

568B

If you are making a crossover cable and one end is 568A, what should the other end be?

Crossover cable

If you want to connect a computer directly to another computer without using a switch, you use a __________.

E1

In Europe, what circuit would be similar to the T1 found in the United States?

Dynamic

In most cases, a __________ address is assigned by a DHCP server.

True

Infrastructure mode is what a wireless access point uses.

Continuity tester

One of the network connections to a programmer's computer has failed. You suspect it involves a problem with the twisted-pair cable. What tool should you use to test for any problems in the cable?

telnet

What command can you use to connect to a mail server so that you can test SMTP?

nbtstat -R

What command clears the NetBIOS name cache?

netstat -e

What command displays Ethernet statistics?

ipconfig

What command displays the IP address, subnet mask, and default gateway of the system you are currently on?

ipconfig /flushdns

What command do you use to clear the DNS cache on a local system?

ftp

What command do you use to connect to a FTP server to download a file?

telnet

What command do you use to connect to a remote computer so that you can execute commands?

netstat

What command do you use to display active TCP or UDP connections?

netsh

What command do you use to display and modify the network configuration of a local computer?

ipconfig /all

What command do you use to display the MAC address on a system?

route print

What command do you use to display the routing table on a local system?

ipconfig /renew

What command do you use to reacquire IP configuration from a DHCP server?

ipconfig /registerdns

What command do you use to register the computer's name and IP address with the nearest DNS server?

ipconfig /release

What command do you use to release the IP configuration handed out by a DHCP server?

ipconfig /renew

What command do you use to retrieve or update your DHCP assigned configuration?

ping 127.0.0.1

What command do you use to test a systems IPv4 protocol stack?

ping

What command do you use to test the TCP/IP stack on a computer?

route

What command is used to add static routes to a Windows computer?

nbtstat

What command is used to display NetBIOS over TCP/IP statistics?

pathping

What command tests network connectivity while showing you each hop along the way and the degree of packet loss?

tracert

What command tests network connectivity while showing you each hop along the way?

Default gateway

What defines the nearest router for a host?

CSU/DSU

What device acts as a high-speed modem for a LAN?

Subnet

What do you call a smaller network that is part of a larger network?

Crosstalk

What do you call it when electrical signals jump to another set of wires?

Switch

What do you use to create VLANs?

VLAN

What do you use to isolate a group of computers within your organization?

PAD

What does X.25 use as its DTE device?

IP forwarding

What feature within Windows allows the server to act as a router?

Of the two devices, a hub in considered a smart device.

What is not a characteristic of a network hub?

Wireless Access Point

What is the central device used in wireless LANs?

255.255.0.0

What is the default subnet mask for a Class B network?

254

What is the maximum number of hosts you can use for each subnet that belongs to a class C address?

Category 5

What is the minimum category of twisted-pair cable you need to support 100 Mbps?

RJ45

What is the most common adapter or connector used to connect a computer to a wired network?

UTP

What is the most common cable used today?

Switch

What is the most common central device used today to connect computers to a network?

Slow speeds

What is the primary disadvantage of X.25?

SSID (Service Set Identifier)

What is used to identify a wireless network?

NAT

What is used to remap private addresses to public addresses and back?

IP address

What is used to uniquely identify a host on a TCP/IP network?

Session

What layer in the OSI model is responsible for logging on and off?

Presentation

What layer in the OSI model is used to encrypt data?

CSMA/CA

What mechanism do wireless networks use to access the network?

OSI reference model

What model is used to describe how data communication occurs between hosts?

Distributive Computing

What model promises the most processing power?

Remote Desktop Services

What name does Windows Server 2008 R2 use for Terminal Services?

Demarc

What part of the network is the point where the responsibility of the administrator ends and the telecommunications provider's responsibility begins?

53

What port does DNS use?

3389

What port does Remote Desktop Services use?

Dynamic Ports

What ports are defined above 49,152?

DHCP

What protocol automatically configures IP configuration for a client?

IPsec

What protocol is used with L2TP to encrypt data?

Frame Relay

What replaced X.25?

RIP

What routing protocol is the most popular distance-vector routing algorithm used to determine the best routes within a network?

OSPF

What routing protocol is the most popular link-state protocol used within a large organization?

DNS

What server is used to translate host names to IP addresses?

WINS

What service on a Windows network is used to translate between NetBIOS names/computer names and IP addresses?

100 Mbps

What speed does FDDI use?

1.544 Mbps

What speed does a T1 run at?

802.3

What standard describes CSMA/CD?

Packet switching

What technology takes data and breaks them into packets and sends them over a network, sometimes using different routes for each packet?

DSL

What technology uses wires from the telephone company to provide broadband Internet connection?

Ring

What topology does FDDI use?

APIPA

What type of address is 169.254.32.23?

IPv6

What type of address is 2001:4212:0000:34DB:0000:0000:0000:4231?

Broadcast address

What type of address is 202.23.2.255 assuming it is a classfull address?

Multicast address

What type of address is used to send a single set of packets to multiple specific hosts?

Plenum-rated

What type of cable should be used as part of a fire code for a building?

Unicast

What type of communication is sent to a single designated host?

Network Controller

What type of server does Active Director run on?

Microsoft RRAS

What would you use to create VPN tunnels so that users can connect to your internal network while at home using Windows Server 2008 R2?

Demilitarized Zone (DMZ)

What zone is used to publish external websites for an organization?

hop

When a packet traverses a network, each router is a _____.

Attenuation

When a signal degrades as it runs through a wire, you have ________.

Virtual circuit

When you have multiple circuits connected to a site, the entire circuit is known as a ___________.

RFI

When you pick up your wireless phone, your computer drops network connectivity. What could be the cause of the problem?

ESP (Encapsulating Security Payload)

Which IPsec component includes the most security, including confidentiality?

AH (Authentication Header)

Which IPsec component provides connectionless integrity and data authentication but does not provide confidentiality?

Transport

Which OSI layer is missing? Physical, Data Link, Network, Session, Presentation, and Application

Category 6

Which cable type would you select if you were tasked to design new wiring for a building that fast speed was essential?

ping tracert

Which command is not used to test the TCP/IP stack on a computer?

SA (Security Association)

Which component of IPSec is generates the encryption and authentication keys?

WPA2

Which is the most secure encryption used in wireless networks?

Application

Which layer in the OSI model covers HTTP, FTP, and RDC?

Network

Which layer in the OSI model covers routing between networks?

Data Link

Which layer in the OSI model do MAC addresses and switches use?

Physical

Which layer in the OSI model includes the cable and network adapters?

Transport

Which layer in the OSI model is used to verify that data was delivered without error?

Data Link layer

Which layer of the OSI model includes VLANs?

Session

Which layer of the OSI model is used to create a connection so that a host can transfer files?

Peer-To-Peer

Which model does each host have their own security database?

Client/Server

Which model uses a central database for authentication?

Full Duplex

Which of the following does a switch use for increased performance?

Single-mode fiber supports longer distances than multimode fiber.

Which of the following is a characteristic of single-mode fiber?

RJ-45

Which of the following is not a fiber connector? MT-RJ FC RJ-45 LC

200.23.34.120

Which of the following is not a private address? 192.168.34.3 10.4.24.24 200.23.34.120 172.16.36.45

Error checking or connectionless communication

Which of the following is not an advantage or characteristic of UDP over TCP?

Acknowledge

Which of the four steps for a client to get an IP address from a DHCP server is not listed? Discover, Offering, Request

192.168.1.1

Which of these is not a loopback IP address? 127.0.0.1 127.3.3.1 192.168.1.1 127.254.254.254

67/68

Which of these ports does DHCP use?

Well-known ports

Which port categories include inbound ports of HTTP, HTTPS, FTP, and DNS?

44.7 Mbps

At what speed does a T3 line run?

Class D

For IPv4, what class is used for multicasting?

802.1x

For organizations, using ___________ authentication for wireless networks is recommended.

64 Kbps

How fast is a DS0 circuit?

23

How many B channels does an ISDN PRI support?

128

How many bits is an IPv6 address?

4

How many layers does the TCP/IP model have?

Protocol

TCP/IP and IPX/SPX are known as _________ stacks.

packet switching

X.25 and Frame Relay are examples of what type of WAN technology?

Fiber

You are setting up a network within a warehouse using Category 6 UTP. However, parts of the network are performing poorly because of the heavy machinery used. What cable type should you use? Choose the best answer.

The host cannot find a DHCP server

You have a computer that cannot connect to a server. When you look at the IP configuration, the host has an address of 169.32.54.2. What is the problem?

It cannot communicate with a DHCP server

You have a computer with an address of 169.254.32.23 and a subnet mask of 255.255.0.0, yet you cannot connect to your local file servers. What is most likely the problem?

Class B

You have a host with the address of 180.24.45.120. To what class would this be address be assigned?

/20

You have a subnet mask of 255.255.240.0. What would the CIDR notation be?

Remote Desktop Connection using the RDP protocol

You use the ________ to connect to a terminal server.

VPN

________ allows a user to connect to a corporate network using the Internet.

DNS

_________ provides name resolution between domain names and IP addresses.