Net Essentials exam
what are three ranges of IP address that are reserved for internal private use? 10.0.0.0/8 64.100.0.0/14 127.16.0.0/12 172.16.0.0/12 192.31.7.0/24 192.168.0.0/16
10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
which subnet would include the address 192.168.1.96 as a useable host address? 192.168.1.64/26 192.168.1.32/27 192.168.1.32/28 192.168.1.64/29
192.168.1.64/26
which addresses are valid public addresses? 198.133.219.17 192.168.1.245 10.15.250.5 128.107.12.117 192.15.301.240 64.104.78.227
198.133.219.17 128.107.12.117 64.104.78.227
how many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask? 254 190 192 62 64
62
A wireless host needs to request an IP address. What protocol would be used to process the request?
DHCP
Which two protocols operate at the highest layer of the TCP/IP protcol stack?
DNS POP
What are two benefits of using a layered network model?
It assists in protocol design It prevents technology in on layer from affecting other layers
What are three characteristics of an SVI? It is designed as a security protocol to protect switch ports. It is not associated with any physical interface on a switch. It is a special interface that allows connectivity by different types of media. It is required to allow connectivity by any device at any location. It provides a means to remotely manage a switch. It is associated with VLAN1 by default.
It is not associated with any psychical interface on a switch It provides a means to remotely manage a switch It is associated with VLAN1 by default
What is a characteristic of the LLC sublayer It provides the logical addressing required that identifies the device. It provides delimitation of data according to the physical signaling requirements of the medium. It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media. It defines software processes that provide services to the physical layer.
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media
What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame
After several configuration changes are made to a router, the copy running-configuration strartup-configuration command is issued. Where will the changes be stored?
NVRAM
A technician configures a switch with these commands: SwitchA(config)# interface vlan1 Switch A(config-if)#ip address 192.168.1.1 255.255.255.0 Switch A(config-if)# no shutdown What is the technician configuring?
SVI
What protocol is responsible for controlling the size of segments and the rate at which segments are exchanged between a web client and a web server?
TCP
Refer to the exhibit, From Global Configuration mode, an administrator is attempting to create a message-of-the-day banner by using the command banner motd V Authorized access only! Violators will be prosecuted! V When users log in using Telnet, the banner does not appear correctly. What is the problem?
The delimiting character appears in the banner message
Which three statements characterize UDP? UDP provides basic connectionless transport layer functions. UDP provides connection-oriented, fast transport of data at Layer 3. UDP relies on application layer protocols for error detection. UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms. UDP relies on IP for error detection and recovery. UDP provides sophisticated flow control mechanisms.
UDP provides basic connection-less transport layer functions UDP relies on application layer protocols for error detection UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms
Which connection provides a secure CLI session with encryption to a Cisco switch?
an SSH connection
Which two roles can a computer assume in a peer-to-peer network where a file is being shared between two computers?
client server
Which two tasks are functions of the presentation layer?
compression encryption
What are the three primary functions provided by Layer 2 data encapsulation? error correction through a collision detection method session control using port numbers data link layer addressing placement and removal of frames from the media detection of errors through CRC calculations delimiting groups of bits into frames conversion of bits into data signals
data link layer addressing detection of errors through CRC calculations delimiting groups of bits into frames
what important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
destination and source port numbers
What are two examples of the cut-through switching method?
fast-forward switching fragment-free switching
What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
it will discard the frame
A medium sized business is researching available options for connecting to the internet. The company is looking for a high speed option with dedicated, symmetric access. Which connection type should the company choose?
leased line
what type of ipv6 address if FE80::1
link local
when applied to a router, which command would help mitigate brute-force password attacks against a router?
login block-for 60 attempts 5 within 60
When planning for network growth, where in the network should packet captures take place to assess network traffic?
on as many different network segments as possible
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
psychical layer
What are two services provided by the OSI network layer? performing error detection routing packets toward the destination encapsulating PDUs from the transport layer placement of frames on the media collision detection
routing packets toward the destination encapsulating PDUs from the transport layer
what characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
scalability
What is the process of dividing a data stream into smaller pieces before transmission?
segmentation
What is the TCP mechanism used in congestion avoidance?
sliding window
What information is added during encapsulation at OSI layer 3?
source and destination IP address
Which type of UTP cable is used to connect a PC to a switch port?
straight-through
When IPv4 addressing is manually configured on a web server, which property of the IPv4 configuration identifies the network and host portion for an IPv4 address?
subnet mask
A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.) the amount of traffic that is currently crossing the network the sophistication of the encapsulation method applied to the data the type of traffic that is crossing the network the latency that is created by the number of network devices that the data is crossing the bandwidth of the WAN connection to the Internet the reliability of the gigabit Ethernet infrastructure of the backbone
the amount of traffic that is currently crossing the network the type of traffic that is crossing the network the latency that is created by the number of network devices that the data is crossing
A network technician is attempting to configure an interface by entering the following command: SanJose(config)# ip address 192.168.2.1 255.255.255.0. The command is rejected by the device. What is the reason for this?
the command is being entered from the wrong mode of operation
which statement is true about variable-length subnet masking? Each subnet is the same size. The size of each subnet may be different, depending on requirements. Subnets may only be subnetted one additional time. Bits are returned, rather than borrowed, to create additional subnets.
the size of each subnet may be different, depending on requirements
In computer communication what is the purpose of message encoding?
to convert information to the appropriate form for transmission
Why does a layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify the network address of the destination network
what is the purpose of having a converged network?
to reduce the cost of deploying and maintaining the communication infrastructure
what is the function of the HTTP GET message?
to request an HTML page from a web server
What are two functions of NVRAM?
to retain contents when power is removed to store the startup configuration file
what are two actions performed by a Cisco switch? building a routing table that is based on the first IP address in the frame header using the source MAC addresses of frames to build and maintain a MAC address table forwarding frames with unknown destination IP addresses to the default gateway utilizing the MAC address table to forward frames via the destination MAC address examining the destination MAC address to add new entries to the MAC address table
using the source MAC addresses of frames to build and mantain a MAC address table Utilizing the MAC address table to forward frames via the destination MAC address
in what two situations would UDP be the preferred transport protocol over TCP?
when a faster delivery mechanism is needed when applications do not need to guarantee delivery of the data
