Networking Devices Flashcards
Which of the following is not a term used when making SOHO Internet connections?
Hub
Router
NIC
NIC
NICs are the physical network connections for a computer but are not one of the devices or mediums used to provide Internet access in a SOHO setting
What advantage does a switch have over a hub?
It discards frames.
Transmissions received on one port will be sent out all the other ports.
It recognizes frame boundaries and destination MAC addresses of incoming frames.
It recognizes frame boundaries and destination MAC addresses of incoming frames.
Like a hub, a switch connects multiple segments of a network together, with one important difference. Whereas a hub sends out anything it receives on one port to all the others, a switch recognizes frame boundaries and pays attention to the destination MAC address of the incoming frame as well as the port on which it was received
Which device is used to segment a network?
Hub
Switch
Repeater
Switch
When we say segment, we mean to create multiple collision or broadcast domains. Hubs don’t segment a network; they just connect network segments together. Repeaters don’t segment the network; they repeat a signal and allow the distance covered to be increased. So the only correct option is B, a switch
What is the primary function of a bridge?
Breaks up collision domains
Allows a NIC or other networking device to connect to a different type of media than it was designed for
Allows mobile users to connect to a wired network wirelessly
Breaks up collision domains
The primary function of a bridge is to keep traffic separated on both sides of it, breaking up collision domains
A network device that is used to connect multiple devices together without segmenting a network is a ____________.
Hub
Wireless access point
Switch
Hub
Hubs create one collision domain and one broadcast domain
Which of the following is among the benefits of a switch?
Protects LAN resources from attackers on the Internet
Provides extra bandwidth
Reduces throughput
Provides extra bandwidth
By allowing full-duplex operation on each port, a switch provides extra bandwidth to each port
Which of the following devices can work at both Layers 2 and 3 of the OSI model?
Hub
Switch
Multilayer switch
Switch
A switch is typically just a Layer 2 device segmenting the network by using MAC addresses. However, some higher-end switches can provide Layer 3 services
What is an advantage of using DHCP in a network environment?
Static IP addressing
Can send an operating system for the PC to boot from
Assigns IP address to hosts
Assigns IP address to hosts
Remember that DHCP servers assign IP addresses to hosts. Thus, DHCP allows easier administration than providing IP information to each host by hand (called static IP addressing)
What is a benefit of a multilayer switch (MLS) over a Layer 2 switch?
Less bandwidth
Routing functions
Fewer features
Routing functions
Multilayer switches (also called Layer 3 switches) don’t have fewer features, less bandwidth, or fewer ports than a normal switch; they just allow routing functions between subnets
Which device should be used if you need to send incoming packets to one or more machines that are hidden behind a single IP address?
Switch
Load balancer
Hub
Load balancer
A load balancer uses a little trickery and sends incoming packets to one or more machines that are hidden behind a single IP address. Modern load-balancing routers can use different rules to make decisions about where to route traffic, which can be based on least load, fastest response times, or simply balancing requests
What role does the A record in a Domain Name Service (DNS) server have in your network?
Translates human name to IP address
Translates IP address to human name
Enables printing, copying, and faxing from one device
Translates human name to IP address
DNS translates human names to IP addresses for routing your packet through the Internet. Hosts can receive the IP address of this DNS server and then resolve hostnames to IP addresses
Which device does not aid in network segmentation?
Router
Switch
Hub
Hub
Routers, switches, and bridges are all devices that help break up big networks into a number of smaller ones—also known as network segmentation. Hubs don’t segment networks—they just connect network segments together
What is the most common use for a web proxy?
Web cache
Throughput increase
DHCP services
Web cache
Web cache, of course! Most proxy programs provide a means to deny access to certain URLs in a blacklist, thus providing content filtering, usually in corporate environments
Which is not an advantage of network segmentation?
Reducing congestion
Improving security
Containing network problems
Preventing broadcast storms
Preventing broadcast storms
Options A, B, and C all aid in boosting network performance, so the only option left is broadcast storms. Increased traffic will increase LAN congestion
Users arrive at the office after a weekend and the hosts that were shut down over the weekend are restarted but cannot access the LAN or Internet. Hosts that were not shut down are working fine. Where can the problem be?
The DNS server
The DHCP server
The proxy server
The DHCP server
If the DHCP server has stopped functioning, it will not hand out IP addresses to hosts that are restarted. However, the hosts that were not shut down still have IP addresses because the lease time has not expired
