Assessment test questions (1) Flashcards
What is the basic purpose of a local area network (LAN)?
To interconnect networks in several different buildings
To connect one or more computers together so they can share resources
To interconnect 2 to 10 routers
To connect one or more computers together so they can share resources
LANs generally have a geographic scope of a single building or smaller. They can be simple (two hosts) to complex (with thousands of hosts)
You need a topology that is easy to troubleshoot and scalable. Which would you use?
Bus
Star
Mesh
Star
Star topologies are the easiest to troubleshoot and can easily scale to large sizes
IP resides at which layer of the OSI model?
Application
Data Link
Network
Network
IP is a Network layer protocol. Internet Explorer is an example of an Application layer protocol, Ethernet is an example of a Data Link layer protocol, and T1 can be considered a Physical layer protocol
Layer 2 of the OSI model is named ________.
Network layer
Transport layer
Data Link layer
Data Link layer
Layer 2 of the OSI model is the Data Link layer, which provides the physical transmission of the data and handles error notification, network topology, and flow control
Which RG rating of coax is used for cable modems?
RG-59
RG-58
RG-6
RG-6
Cable modems use RG-6 coax cables
Which UTP wiring uses four twisted wire pairs (eight wires) and is rated for 250 MHz?
Category 3 UTP
Category 5 STP
Category 6 UTP
Category 6 UTP
To get the high data-transfer speed, like 1 Gbps, you need to use a wire standard that is highly rated, such as Category 5e or Category 6
If you are running half-duplex Internet, which of the following is true? (Choose all that apply.)
Your digital signal cannot transmit and receive data at the same time.
Hosts use the CSMA/CD protocol to detect collisions.
The physical connection consists of one wire pair.
None of the above.
Your digital signal cannot transmit and receive data at the same time.
Hosts use the CSMA/CD protocol to detect collisions.
The physical connection consists of one wire pair.
With half duplex, you are using one wire pair with a digital signal either transmitting or receiving (but not both at once). Carrier Sense Multiple Access with Collision Detection (CSMA/CD) helps packets that are transmitted simultaneously from different hosts share bandwidth evenly
You need to connect a hub to a switch. You don’t like this idea because you know that it will create congestion. What type of cable do you need to use to connect the hub to the switch?
EtherIP
Crossover
Straight-through
Crossover
To connect two switches together or a hub to a switch, you need a crossover cable
Your boss asks you why you just put in a requisition to buy a bunch of switches. He said he just bought you a bunch of hubs five years ago! Why did you buy the switches?
Because each switch port is its own collision domain.
The cable connecting devices to the hub wore out, and switches were cheaper than new cable.
There were too many broadcast domains, and a switch breaks up broadcast domains by default.
Because each switch port is its own collision domain.
For the most part, switches are not cheap; however, one of the biggest benefits of using switches instead of hubs in your internetwork is that each switch port is actually its own collision domain. A hub creates one large collision domain. Switches still can’t break up broadcast domains (do you know which devices do?). Hubs do not recognize frames and data structures but switches do
Which device would connect network segments together, creating separate collision domains for each segment but only a single broadcast domain?
Hub
Router
Switch
Switch
A switch creates separate collision domains for each port but does not break up broadcast domains by default
Most Application layer protocols use only UDP or TCP at the Transport layer. Which of the following could use both?
TCP
Telnet
DNS
DNS
DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address
HTTP, FTP, and Telnet work at which layer of the OSI model?
Application
Presentation
Session
Application
HTTP, FTP, and Telnet use TCP at the Transport layer; however, they are all Application layer protocols, so the Application layer is the best answer for this question
IPv6 uses multiple types of addresses. Which of the following would describe an anycast address used by an IPv6 host?
Communications are routed to the most distant host that shares the same address.
Packets are delivered to all interfaces identified by the address. This is also called one-to-many addressing.
This address identifies multiple interfaces, and the anycast packet is only delivered to one address. This address can also be called one-to-one-of-many.
This address identifies multiple interfaces, and the anycast packet is only delivered to one address. This address can also be called one-to-one-of-many.
Anycast is a new type of communication that replaces broadcasts in IPv4. Anycast addresses identify multiple interfaces, which is the same as multicast; however, the big difference is that the anycast packet is delivered to only one address: the first one it finds defined in terms of routing distance. This address can also be called one-to-one-of-many
Which of the following IP addresses are not allowed on the Internet? (Choose all that apply.)
- 255.255.1
- 1.1.1
- 33.255.0
- 168.0.1
- 1.1.1
- 168.0.1
The addresses in the ranges 10.0.0.0 through 10.255.255.255 and 172.16.0.0 through 172.31.255.255 as well as 192.168.0.0 through 192.168.255.255 are all considered private, based on RFC 1918. Use of these addresses on the Internet is prohibited so that they can be used simultaneously in different administrative domains without concern for conflict
What is the subnetwork address for a host with the IP address 200.10.5.168/28?
- 10.5.156
- 10.5.132
- 10.5.160
200.10.5.160
This is a pretty simple question. A /28 is 255.255.255.240, which means that our block size is 16 in the fourth octet. 0, 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, and so on. The host is in the subnet 160
