ITN 100

Question 1 – Today, the most expensive part of the network is the hardware.

False

Question 2 – Today, many organizations design networks using the building-block approach.

True

Question 3 – The primary goal of the needs analysis step in network design is to develop a physical network design.

False

Question 4 – Simulation is a tool that can be used in designing networks.

True

Question 5 – Cost assessment is the step in the network design in which many complex factors related to costs are documented.

True

Question 6 – When obtaining the support of senior management for a proposed network, it is important to use as much technical network jargon as possible.

False

Question 7 – The campus backbone is usually faster than the backbones used inside buildings.

True

Question 8 – In the technology design stage of network design:

the decisions for fundamental technology/protocols and circuit capacity are interrelated

Question 9 – refers to the amount of data transmitted on a circuit.

Circuit loading

Question 10 – STP cable is least costly type of cable used in today’s networks and is the most commonly used cable type in connecting computers to switches.

False

For Ethernet example (100Base-T), what are its speed, transmission, and structure?

Speed: 100\text{ Mbps}, Transmission: baseband, Structure: twisted-pair

What are ways to improve LAN performance?

Upgrade switches, segment traffic, increase bandwidth, reduce collisions

What do war-chalking, war-driving, and war-walking refer to?

Methods of discovering wireless networks

Compare Switched vs Wireless Ethernet.

Switched: faster, secure, dedicated; Wireless: mobile, shared, flexible

What are three IEEE 802.11 types?

802.11b (legacy), 802.11g (mixed), 802.11n/ac (high speed)

Question 16 – The Ethernet standard was first developed by the IEEE.

False

Question 17 – Physical topology refers to the geometric layout of the network and describes how the computers are interconnected.

True

Question 18 – A collision on a bus circuit means that two computers on that circuit have transmitted at the same time.

True

Question 19 – The three latest versions of Ethernet run at speeds of 1\text{Gbps}, 10\text{Gbps}, and 50\text{Gbps}.

False

Question 20 – 1000Base-LX is a version of 1000Base-T than runs on four pairs of CAT 5 cable.

False

Question 21 – A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.

False

Question 22 – A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone.

False

Question 23 – One basic component of a backbone network is the hardware device that connects other networks to the backbone.

True

Question 24 – Layer-3 switches switch messages based only on their data link layer address.

False

Question 25 – Routed backbones use switches that move packets based on data link layer addresses.

False

Question 26 – A key advantage of a chassis switch is its flexibility.

True

Question 27 – A VLAN network assigns computers to LAN segments by hardware.

False

Question 28 – Switches:

learn addresses by reading the source and destination addresses

Question 29 – Routers:

may also be called TCP/IP gateways

Question 30 – Which of the following would be least effective in improving backbone performance?

adding new keyboards to the client computers

Question 31 – Circuit capacity on a backbone network will not be improved by:

going from 100\text{Base-T} Ethernet to 10\text{Base-T} Ethernet

Question 32 – Which of the following would not be part of an “ideal” backbone design?

coax cabling throughout LANs and BN

Question 33 – The backbone architecture layer that is closest to the users is the:

Access layer

Question 34 – Common carriers sell or lease communication services and facilities to the public.

True

Question 35 – Today, a common carrier that provides long distance services is typically called a local exchange carrier.

False

Question 36 – T carrier circuits can only be used to transmit voice.

False

Question 37 – A T1 circuit provides a data rate of 1.544\text{Mbps}.

True

Question 38 – Frame relay is a reliable packet service.

False

Question 39 – The data rate for a T-3 circuit in North America is:

274.176\text{ Mbps}

Question 40 – Which of the following type of networks permit packets from separate messages to be interleaved?

packet switched network

Question 41 – A is a connectionless method of sending data packets on a packet switched service.

datagram

Question 42 – A ** is a connection-oriented approach to sending packets on a packet switched service.

permanent virtual circuit

Question 43 – **** are sometimes called private line services.

Dedicated-circuit networks

Question 44 – is sometimes called a Layer 2.5 technology.

MPLS

Question 45 – The Internet is one large network.

False

Question 46 – Each of the networks in Internet 2 has a set of access points called terapops.

False

Question 47 – At the top of the Internet structure are tier 1 ***, such as AT&T and Sprint.

Internet service providers

Question 48 – ** has led to the belief that the Internet is “free”.

Peering

Question 49 – refers to the fact that ISPs do not charge one another (at the same level) for transferring messages they exchange across an NAP or MAE.

Peering

Question 50 – A is the place at which the ISP provides services to its customers.

point-of-presence

Question 51 – In general, tier 3 ISPs make money by charging .

Customers

Question 52 – The is the connection from a home or business to the telephone company end office.

Local loop

Question 53 – At the DSL customer premises is a device called a(n)

DSL modem

Question 54 – A cable company headend is also referred to as a:

Distribution hub

Question 55 – Fiber to the Home uses:

wavelength division multiplexing

Question 56 – Confidentiality refers to the protection of the organizational data from unauthorized disclosure of customer and proprietary data.

True

Question 57 – Corrective controls reveal or discover unwanted events.

False

Question 58 – We can calculate the relative , by multiplying the impact score by the likelihood.

risk score

Compare DES vs public key encryption.

DES is symmetric; public key is asymmetric

What is asymmetric encryption?

Uses public/private key pair

What do network-, host-, and application-based IPS protect?

Protect network, device, or specific application

What are three risk frameworks?

NIST, ISO 27001, COBIT

What are four risk control strategies?

Avoid, mitigate, transfer, accept

Question 64 – An uninterruptible power supply utilizes a second redundant disk for every disk on the server.

False

Question 65 – Disk mirroring writes duplicate copies of all data on at least two different disks.

True

Question 66 – Fault-intolerant servers contain many redundant components to prevent failure.

False

Question 67 – Crackers are casual hackers with a limited knowledge of computer security.

False

Question 68 – If managers do not pay enough attention to planning and organizing the network, they are going to end up being proactive vs. reactive in solving network problems.

False

Question 69 – Due to changing communication technologies, most companies have combined voice and data communications functions.

True

Question 70 – Network management software is designed primarily to provide automated support for at least some of the network management functions.

True

Question 71 – Which of the following is not considered a key management task for running a network?

knowledge of frame relay

Question 72 – refers to managing and documenting the network’s hardware and software configuration.

Configuration management

Question 73 – Which of the following is typically not a part of configuration documentation?

sales brochures for new hardware products being considered by the organization

Question 74 – Documentation for network and application software:

is important for monitoring adherence to software license rules

Question 75 – ensures that the network is operating as efficiently as possible.

Performance management

Question 76 – Which of the following would not be included as part of the physical network parameter statistics monitored by a NMS?

stats on user response times

Question 77 – Network devices that are * do only what they are designed to do, such as routing packets, but do not provide any network management information.

dumb

Question 78 – * are network devices that record data on the messages they process as well as performing their “normal” message processing functions.

Managed devices

Question 79 – are reports produced by numerous network software packages for recording fault information.

Trouble tickets

Question 80 – allows the network manager to determine who is responsible for correcting any outstanding problems.

Problem tracking

Question 81 – Network managers manage the configuration management of their networks as one of their key tasks.

True

Question 82 – The term “firefighting” is used to describe a situation where network managers spend all of their time dealing with breakdowns and immediate problems and do not have time to plan and organize properly.

True

Question 83 – To help in negotiating site licenses for software, it is important to document which software packages are installed on each client.

True

Question 84 – User profiles should enable the network manager to identify the access rights (to particular files and directories) for each user.

True

Question 85 – Trouble tickets are reports produced by a software package that records fault information.

True

Question 86 – To ensure that critical problems get priority over less important ones, problem prioritizing is needed in a network.

True

Question 87 – Management reports can be helpful in determining network availability statistics.

True

Question 88 – Network management software is designed primarily to provide automated support for at least some of the network management functions.

True

Question 89 – is when network managers deal with network breakdowns and immediate problems, instead of performing tasks according to a well laid out plan.

Firefighting

Question 90 – Which of the following is not a basic function of a network manager?

web surfing to shop on eBay

Question 91 – is also called automatic software distribution.

Desktop management

Question 92 – Security on a network not only means being able to prevent a hacker from breaking into your computer but also includes being able to recover from temporary service problems or from natural disasters.

True

Question 93 – The rise of the Internet has increased significantly the potential vulnerability of an organization’s assets.

True

Question 94 – is the most commonly used central authentication protocol.

Kerberos

Question 95 – RAID1 writes duplicate copies of all data on at least two different disks; this means that if one disk in the RAID array fails, there is no data loss because there is a second copy of the data stored on a different disk. This is referred to as *

disk mirroring

Question 96 – A * uses an address table to translate the private IP addresses used inside the organization into proxy IP addresses used on the Internet.

NAT proxy server

What are 8 threats & solutions?

Hardware, software, users, physical, etc. + controls

What is a Trojan horse?

Malware disguised as legitimate software

What is symmetric encryption & algorithms?

Same key; DES < 3DES < AES

What is social engineering?

Manipulating people to gain access