cyan security, 28
Which protocol is used by ping to test connectivity between network hosts?
ICMP
Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host
ICMPv6
What is indicated by a successful ping to the ::1 IPv6 address?
IP is properly installed on the host.
Which protocol provides authentication, integrity,and confidentiality services and is a type of VPN?
IPsec
What contains information on how hard drive partitions are organized?
MBR
Application Layer
The seventh layer of the OSI model. Application layer protocols enable software programs to negotiate formatting, procedural, security, synchronization, and other requirements with the network.
what is a function of a proxy firewall?
connects to remote servers on behalf of clients
What is the command netstat -r used for?
to display the host routing table
What is the main difference between the implementation of IDS and IPS devices?
An IDS would allow malicious traffic to pass before it is addressed, whereas an IPS stops it immediately
How is a source IP address used in a standard ACL?
It is the criterion that is used to filter traffic
Which protocol enables mail to be downloaded from an email server to a client and then deletes the email from the server?
POP3
Which two protocols are considered distance vector routing protocols
RIP, EIGRP
Session Layer
The fifth layer in the OSI model. This layer establishes and maintains communication between two nodes on the network. It can be considered the "traffic cop" for network communications.
Transport Layer
The fourth layer of the OSI model. In this layer protocols ensure that data are transferred from point A to point B reliably and without errors. this layer services include flow control, acknowledgment, error correction, segmentation, reassembly, and sequencing.
Which personnel in a SOC is assigned the task of verifying whether an alert triggered by monitoring software represents a true security incident?
Tier 1 Personnel
Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)
VoIP DNS
what device can control and manage a large number of corporate APs?
WLC
Which two fields are included in the TCP header but not in the UDP header? (Choose two.)
Window, Sequence Number
how are ip addressing designs affected by vlan implementations?
each vlan must have a different network number
What type of server would use IMAP?
which OSI layer header is rewritten with new addressing information by a router when forwarding between LAN segments
layer 2
A user executes a traceroute over IPv6. At what point would a router in the path to the destination device drop the packet?
when the value of the Hop Limit field reaches zero
OSI Model Layers
1. Physical 2. Data Link 3. Network 4. Transport 5. Session 6. Presentation 7. Application
A technician has captured packets on a network that has been running slowly when accessing the internet. Which port number should the technician look for within the captured material to locate HTTP packets?
80
Which statement best describes the operation of the File Transfer Protocol?
An FTP server uses a source port number of 21 and a randomly generated destination port number during the establishment of control traffic with an FTP client.
Which statement describes a characteristic of cloud computing?
Applications can be accessed over the Internet by individual users or businesses using any device, anywhere in the world.
How does BYOD change the way in which businesses implement networks?
BYOD provides flexibility in where and how users can access network resources.
What process is used in ICMPv6 for a host to verify that an IPv6 address is unique before configuring it on an interface?
DAD
Which protocol automates assignment of IP addresses on a network, and which port number does it (Choose two)
DCHP, 67
Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server?
DHCPREQUEST
What are two services provided by the OSI network layer? (Choose two.)
Encapsulating PDUs from the transport layer routing packets toward the destination
A web client is receiving a response for a web page from a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to decode the received transmission?
Ethernet, IP, TCP, HTTP
A system administrator issues the apt-get upgrade command on a Linux operating system. What is the purpose of this command?
Every application installed will update itself to the latest version
What application layer protocol uses message types such as GET, PUT, and POST?
HTTP
What is a characteristic of a WAN?
It connects multiple networks that are geographically separated.
What characterizes a traceroute utility?
It identifies the routers in the path from a source host to a destination host.
Which statement descrbies the Cisco cloud web security?
It is a cloud-based security service to scan traffic for malware and policy enforcement
Which statement describes a MAC Address?
It is a physical address assigned to an Ethernet NIC by the manufacturer.
Which two characteristics describe Ethernet technology? (Choose two).
It uses the CSMA/CD access control method It is supported by IEEE 802.3 standards
For security reasons a network administrator needs to ensure that local computers cannot ping each other. Which settings can accomplish this task?
MAC Address settings
Which tool is used to provide a list of open ports on network devices?
NMap
What application layer protocol describes the services that are used for file sharing in Microsoft networks
SMB
Which network service allows administrators to monitor and manage network devices?
SNMP
Which parameter is commonly used to identify a wireless network name when a home wireless AP is being configured?
SSID
what technology is used to prevent layer 2 loops?
STP
Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)
SYN ACK
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
Segments are sent from the transport layer to the internet layer
Which transport layer feature is used to guarantee session establishment?
TCP 3-way Handshake
What is a benefit of using DDNS
The DDNS provider detects a change to the client IP address and immediately updates the mapping change
Which statement is true about the TCP/IP and OSI models?
The TCP/IP transport layer and OSI Layer 4 provide similar services and functions.
What happens if part of an FTP message is not delivered to the destination?
The part of the FTP message that was lost i s re-sent
Data Link Layer
The second layer in the OSI model. This layer bridges the networking media with the Network layer. Its primary function is to divide the data it receives from the Network layer into frames that can then be transmitted by the Physical layer.
Presentation Layer
The sixth layer of the OSI model. Protocols in the Presentation layer translate between the application and the network. Here, data are formatted in a schema that the network can understand, with the format varying according to the type of network used. The Presentation layer also manages data encryption and decryption, such as the scrambling of system passwords.
Network Layer
The third layer in the OSI model. Protocols in this layer translate network addresses into their physical counterparts and decide how to route data from the sender to the receiver.
What is a characteristic of a TCP server process?
There can be many ports open simultaneously on a server, one for each active server application.
How do hosts ensure that their packets are directed to the correct network destination?
They have to keep their own local routing table that contains a route to the loopback interface, a local network route, and a remote default route.
A user complains that the workstation cannot access the network. The network technician asks the user to issue the ping 127.0.0.1 command. What is the purpose of using this command?
To verify that the TCP/IP stack is operational
Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.)
UDP Segmenets are encapsulated within IP Packets for transport across the network the source port field identifies the running application or service that will handle data returning to the PC
What is a daemon?
a background process that runs without the need for user interaction
On a home network, which device is most likely to provide dynamic IP addressing to clients on the home network
a home router
Which two roles are typically performed by a wireless router that is used in a home or small business?
access point, ethernet switch
A host is transmitting a broadcast. Which host or hosts will receive it?
all hosts in the same network
which sentence correctly describes the SVI inter-vlan routing method?
an svi needed for each vlan
Which OSI model layer contains protocols for process-to-process communication?
application
What is the purpose of the "cd" command?
changes directory to the root directory
which wireless parameter refers to the frequency bands used to transmit data to a wireless access point?
channel settings
What information does an Ethernet switch examine and use to forward a frame?
destination MAC address
what is a role of an intermediary device on a network?
determines the path and directs data along the way to its final destination
What process involves placing one PDU inside of another PDU?
encapsulation
What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly?
flow control
In NAT translation for internal hosts, what address would be used by external users to reach internal hosts? outside global inside local outside local inside global
inside global
Which two pieces of information should be included in a logical topology diagram of a network?
interface identifier, connection type
A particular website does not appear to be responding on a windows 7 computer. What command could the technician use to show any cached DNS entries for this web page
ipconfig/displaydns
Which function or operation is performed by the LLC sublayer
it communicates with upper protocol layers
at what layer of the OSI model do routers operate?
layer 3
What message is sent by a host to check the uniqueness of an IPv6 address before using that address?
neighbor solicitation
A user issues a ping 192.168.219.8 command and receives a response that includes a code of 0. What does this code represent?
network unreachable
What are two characteristics of IP? (Choose two.)
operates independently of network media does not require a dedicated end-to-end connection
For which discovery mode will an AP generate the most traffic on a WLAN?
passive mode
What network monitoring technology enables a switch to copy and forward traffic sent and received on multiple interfaces out another interface toward a network analysis device?
port mirroring
A user issues a ping 2001:db8:3040:114::88 command and receives a response that includes a code of 3. What does this code represent?
port unreachable
What information does an Ethernet switch examine and use to build its address table?
source MAC address
A technician uses the ping 127.0.0.1 command. What is the technician testing?
the TCP/IP stack on a network host
During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?
the next byte that the destination expects to receive
Which technology is used by cisco advanced malware protection (AMP) in defending and protecting against known and emerging threats?
threat intelligence
Which ICMPv6 message is sent when the IPv6 hop limit field of a packet is decremented to zero and the packet cannot be forwarded?
time exceeded
In computer communication, what is the purpose of message encoding?
to convert information to the appropriate form for transmission
Why would a manager need to use the tracert command?
to display a list of the near-side router interfaces between the source device and the destination device
What is the purpose of a personal firewall on a computer?
to filter the traffic that is moving in and out of the PC
Why does a Layer 3 device perform ANDing process n a destination IP address and subnet mask?
to identify the network address of the destination network
What is the purpose of the TCP sliding window?
to request that a source decrease the rate at which it transmits data
A network administrator can successfully ping the server at www.cisco.com, but cannot ping the company web server located at an ISP in another city. Which tool or command would help identify the specific router where the packet was lost or delayed?
traceroute
What are two roles of the transport layer in data communication on a network? (Choose two.)
tracking the individual communication between applications on the source and destination hosts identifying the proper application for each communication stream
At which OSI layer is a destination port number added to a PDU during the encapsulation process?
transport layer