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Cisco
Cisco Systems, Inc. is a major IT company, which produces networking equipment and network management solutions for both personal and commercial use. Questions about this company and its products belong here.
1,095 Questions
How many hosts addresses can be assigned on the 10.0.0.0 with a mask of 255.255.255.0?
254 -- 24 bits of the 32 bit format are fixed (10.0.0 is fixed, so in binary that's 00001010.00000000.00000000) leaving you with the final octet to work with. This octet will yield 256 unique values, but 0 (00000000) and 255 (11111111) are reserved so only 1(00000001) through 254 (11111110) are valid hosts.
Which of the following statements regarding Network Address Translation NAT are true?
Destination NAT forwards requests for network resources using a public IP address to a private IP Address
Dynamic NAT can dynamically assign public ip addresses to internal hosts making requests from resources outside the private network
Source NAT implementations change the source address on outgoing connections from a private IP address to a public address.
What is a Cisco 24 port gigabit switch used for?
It is not a complete necessity to have a gigabit Ethernet switch but it will increase processing speed to 1,000 Mbits per second. Earlier forms of the Ethernet switches were in the 10 to 100 megabit range.
What is the difference between encoding and encrypting?
opening/playing/reading/watching a file (Decoding) and making a file (Encoding)
there are many different ways to read/write a bunch of "1's" and "0's." A files extention (.wav; .mp3; .iso; etc) explains how that file should be read as/written as. For example, this paragraph could be written in Spanish and generally say the same thing with the same general letters.
What is a Cisco 17000 Series Router?
It "routes" the internet to devices that can use it. You can use a cord for it or use a wireless device. Wireless can spread the internet through multiple devices at once while corded internet can't.
VTY interface
console interface
privileged EXEC mode
They are network services that are always on listening on the network for requests. Example: DNS, DHCP .....
DNS resolves Domain Names to IP addresses. DHCP assigns dynamic IP addresses.
What are the benefits to using a layered model to describe network protocols and operations?
-Assists in protocol design, because protocols that operate at a specific layer have defined information that they act upon and a defined interface to the layers above and below.
-Fosters competition because products from different vendors can work together.
-Prevents technology or capability changes in one layer from affecting other layers above and below.
-Provides a common language to describe networking functions and capabilities.
What is the colour code for rj-45?
orange/white, orange, green/white, blue, blue/white, green, brown/white, brown. pins 1-8 respectively
Why header and trailer is present in network layers?
HEADERS: It is a part of an information structure that precedes and identifies the information that follows,such as block of bytes in communication.
TRAILERS:It is an information typically occupying several bytes ,at the tail end of a block of transmitted data which may contain a checksum or other error-checking data useful for confirming the accuracy and status of transmission.
Data Generating Capability of a Device is called Clock Rate.
If the clock rate is high, the processing will be slow down. If the clock rate is low, the processing will be high.
Which options are properties of contention-based media access for a shared media?
- non-deterministic
- less overhead
- collisions exist
What is the function of Cisco VoIP PBX?
A small office PBX is a telephone system that has a variety of benefits and functions. They increase productivity with applications such as Cisco Unified CallConnector which is used for Microsoft Office.
What are the advantages of wireless over wired technology?
,
1. With wireless you can move around with a computer compared to wired when you have to be close to a router or a switch.
2. It is cheaper to connect more people to a network where as with wired you keep having to buy switches to expand the network.
Thanks
Samtuckonline
What is an example of a well-known port?
There are many well known ports around the world. Some of these include Port of Benoa, Port of Busan, and Cozumel.
What exactly is a cisco asa 5505?
A Cisco ASA 5505 is a security and firewall device intended for smaller or branch offices. The ASA 5505 is equipped with eight Ethernet outlets and 10 VPN connections. It can also handle 3 LANs and has a slot for the optional Security Services card for backing up information. The Cisco ASA not only boasts content security, but also intrusion prevention.
What are the function of an application layer?
Application layer is the topmost layer. Application layer is used to access the underling network services using defined procedures. Application layer interacts with software applications that implements a communicating component.
Functions:-
Identifying communication partners.
. Determining resource availability.
Synchronizing communication
What are some features of a Cisco 2610?
One feature of the Cisco 2610 router is that it has either single- or dual-fixed LAN interfaces. Other features of the Cisco 2610 router are that it can browse the internet safely with firewall protection and the routing comes standard with bandwidth management.
Roll over cable colour code for rj45 connector?
To know colour coding of cross cable we need to know some basic facts like where it is use and from where we can generate it.The answeres are crossover or we say cross cable is used for connecting similar devices like pc-pc or hub-hub etc,and we can generate it from the basic colour coding of 568a standard.But the question is how?as 568a standard is a standard for twisted pair but itscomes under the subcategory ofunshield twisted pair cable.so,lets come to the main ans,so here we go--
568a colour coding is
green=gr,white=w,orange=or,blue=bl and brown=br(short form)
1.gr/w
2.gr
3.or/w
4.bl
5.bl/w
6.or
7.br/w
8.br
As we can see above the colour coding of 568a cables{straight(use to connect dissimilar devices like pc-hub)}the basicof colour coding.we can generate the colour coding for cross cable from it-
straight cross
1.gr/w3-1 1-3 1.or/w
2.gr6-22-6 2.or
3.or/w 3.gr/w
4.bl4.bl
5.bl/w5.bl/w
6.or 6.gr
7.br/w 7.br/w
8.br 8.br
As we switch 3-1 that is put no.3 of straight in no.1 of cross(from left side)and cancel no.1 that is gr/w,so we get the combination of or/w in no.1 in cross.As we do the others that is
1-3,6-2 and 2-6(from left side)we get the combination for cross.If somebody wants to remember directly he can,but its the alternate method and from the basics.
How does a router know of path to destination network?
How does a router know of paths to destination networks? (Choose two.)
• inspection of the destination IP address in data packets
ARP requests from connected routers
manual configuration of routes
• updates from other routers
DHCP information broadcasts
updates from the SMTP management information base
When do you need to configure a clock rate on a router interface?
When it needs to provide clocking for the serial line. This occurs when you are using a null-modem cable in a lab. You would apply the clock rate to the router that is connected as the DCE device.
What is the meaning of remote host in computer?
a computer that resides in some distant location from which data can be retrieved .It typially refers to a server in a private network or public network.
