Network+ Chapter 5 Flashcards
is a network device that connects two similar
network segments together. Its primary function is to keep traffic separated on either side. Ch 5 pg 120
bridge
What are three significant differences between a switch and hub? Ch 5 pg 120
a switch recognizes frames and pays attention to the source and destination MAC address of the incoming frame as well as the port on which it was received.
A___________is a network device used to connect many, sometimes disparate, network segments
together, combining them into what we call an_________? Ch 5 pg 121
router and internetwork.
__________are your network’s security guards; and
to be real, they’re probably the most important thing to implement on your network. Ch 5 pg 125
firewalls
True or False A firewall can be either hardware device and software? Ch 5 pg 125
True
_____________is a computer networking device that switches on Open Systems Interconnection (OSI) Layer 2 like an ordinary network switch but provides routing.
Ch 5 pg 130
multilayer switch (MLS)
Which type of organization would use the .org domain?
Ch 5 pg 131
A nonprofit organization.
Which type of organization would use the .int domain?
Ch 5 pg 131
An international organization, such as NATO or the United Nations.
The process of finding the IP address for any given host name is known as ? Ch 5 pg 131
name resolution
is basically a type of server that handles its client-machine requests by forwarding them on to other servers while allowing granular control over the traffic
between the local LAN and the Internet. Ch 5 pg 135
proxy server
There are two main types of proxy servers you’ll typically find working in present-day networks: Ch 5 pg 135
Caching proxy server
Web proxy server
A ___________ server speeds up the network’s service requests by recovering information from a client’s or clients’ earlier request. Caching proxies keep local
copies of the resources requested often, which really helps minimize the upstream use of bandwidth. These servers can greatly enhance network performance.Ch 5 pg 135
caching proxy
A _________ is usually used to create a web cache. You experience this when you Google a site you’ve visited before. The web proxy “remembers” you, and the site not only loads faster, but sometimes even recalls your personal information by automatically
filling in your username—or even your billing/shipping information when you place another order. Ch 5 pg 135
web proxy server
What are at least 5 things that can cause LAN traffic congestion?
Ch 5 pg 138
Too many hosts in a broadcast domain Broadcast storms Multicasting Low bandwidth Adding hubs for connectivity to the network
Define network segmentation? Ch 5 pg 138
Breaking up a larger network into smaller networks
the set of all devices on a network segment that hear all the broadcasts sent on that segment. Ch 5 pg 138
broadcast domain
A_________ can replace the hub, breaking up collision domains. Ch 5 pg 138
switch
What are two advantages of using routers in your network:
Ch 5 pg 139
They don’t forward broadcasts by default.
They can filter the network based on Layer 3 (Network layer) information (such as IP address).
Four router functions in your network can be listed as follows: Ch 5 pg 140
Packet switching
Packet filtering
Internetwork communication
Path selection
Their are 6 things you should commit to memory about routers. What are they? Ch 5 pg 144
Routers, by default, will not forward any broadcast or multicast packets.
Routers use the logical address in a Network-layer header to determine the next hop router to forward the packet to.
Routers can use access lists, created by an administrator, to control security on the types of packets that are allowed to enter or exit an interface.
Routers can provide Layer 2 bridging functions if needed and can simultaneously route through the same interface.
Layer 3 devices (routers, in this case) provide
connections between virtual LANs (VLANs).
Routers can provide quality of service (QoS) for specific types of network traffic.
Layer 2 switching is considered hardware-based bridging because it uses specialized hardware called an______?
Ch 5 pg 144
application-specific integrated circuit (ASIC). ASICs can run up to gigabit speeds with very low latency rates.
__________is the time measured from when a frame enters a port to the time it exits a port. Ch 5 pg 144
Latency
is essentially used to learn the MAC addresses of all nodes and their associated port, to filter incoming frames whose destination MAC addresses are located on the same incoming port, and to forward incoming frames to the destination MAC through their associated port
transparent bridging
A humidifying system should be used to maintain the level above_______percent. Ch 5 pg 147
50%
When a server room becomes too hot what happens to some of the equipment? Ch 5 pg 147
servers start rebooting and appliance CPU’s start overworking which could lead to system failure.
What two major things should you have in your data center to make sure your equipment doesn’t over heat and keep the servers up and running in case of power failure? Ch 5 pg 147
heavy duty HVAC
UPS
