Data Communications and Networking 4

 IT6300 Data Communications and Networking 4

Which WAN technology uses a fixed payload of 48 bytes and is transported across both switched and permanent virtual circuits?	ATM
Satellite Internet services are used in locations where land-based Internet access is not available, or for temporary installations that are mobile.	True
With which layers of the OSI model do the PPP control protocols interface?	NCP interfaces with Layer 3; LCP interfaces with Layer 1
A general term for Internet services from a mobile phone or from any device that uses the same technology	wireless internet
A newer and faster technology considered to be part of 4G technology.	long-tern evolution
Which additional functionality is available on an interface when the encapsulation is changed from HDLC to PPP?	authentication
Which medium do service providers use to transmit data over WAN connections with SONET, SDH, and DWDM?	fiber optic
What equipment at the cable service provider office connects the office to the subscriber locations?	CMTS
A general term for Internet services from a mobile phone or from any device that uses the same technology	Wireless internet
What is an advantage offered by GRE tunnels?	support for IP multicast tunneling
When a PPPoE configuration is being verified, which command can be used to verify the MTU size and encapsulation type configured on a Cisco router?	show interface dialer 1
What is a disadvantage of leased lines?	high cost
Which one of the WAN technologies is inadequate for video traffic but operates adequately for voice traffic?	ISDN BRI
a type of network that establishes a dedicated circuit (or channel) between nodes and terminals before the users may communicate.	Circuit-switched network
Dynamic Multipoint VPN (DMVPN) is a Cisco software solution for building multiple VPNs in an easy, dynamic, and scalable manner	True
What is a characteristic of a WAN?	WAN service providers include carriers such as a telephone network or satellite service.
When a PPPoE configuration is being verified, which command can be used to verify the MTU size and encapsulation type configured on a Cisco router?	show interface dialer 1
Generic Routing Encapsulation (GRE) is one example of a basic, non-secure, site-to-site VPN tunneling protocol.	True
Which public WAN technology provides security by using encrypted tunnels over Internet connections?	VPN
To verify the state of a GRE tunnel, use the show interface tunnel command.	True
A site-to-site VPN is created when devices on both sides of the VPN connection are aware of the VPN configuration in advance.	True
What function does NCP perform in the establishment of a PPP session?	It completes the specific configuration of the network layer protocol that is being used.
What range of IP addresses is represented by the network and wildcard mask 192.168.70.0 0.0.0.127?	192.168.70.0 to 192.168.70.127
What is the protocol that provides ISPs the ability to send PPP frames over DSL networks?	PPPoE
Internal BGP is the routing protocol used between routers in the same AS.	True
The use of BGP is most appropriate when an AS has connections to multiple autonomous systems.	True
A type of digital modem used with high-speed DSL or cable Internet service.	broadband modem
It is a WAN protocol that provides Provides router-to-router and host-to-network connections over synchronous and asynchronous circuits	PPP
It is the default encapsulation type on point-to-point connections, dedicated links, and circuit-switched connections when the link uses two Cisco devices.	HDLC
Which IPv4 address range covers all IP addresses that match the ACL filter specified by 172.16.2.0 with wildcard mask 0.0.1.255?	172.16.2.0 to 172.16.3.255
Which medium do service providers use to transmit data over WAN connections with SONET, SDH, and DWDM?	fiber optic
Which statement describes a difference between the operation of inbound and outbound ACLs?	Inbound ACLs are processed before the packets are routed while outbound ACLs are processed after the routing is completed.
An administrator has configured an access list on R1 to allow SSH administrative access from host 172.16.1.100. Which command correctly applies the ACL?	R1(config-line)# access-class 1 in
Which statement correctly describes a WAN technology?	MPLS can be used to deliver any type of packet between sites.
This is a point established in a building or complex to separate customer equipment from service provider equipment	demarcation point
A network engineer is troubleshooting an unsuccessful PPP multilink connection between two routers. The multilink interface has been created and assigned a number, the interface has been enabled for multilink PPP, and the interface has been assigned a multilink group number that matches the group assigned to the member physical serial interfaces. The physical serial interfaces have also been enabled for PPP multilink. Which additional command should to be issued on the multilink interface?	no ip address
It is a networking device that provides internetworking and WAN access interface ports that are used to connect to the service provider network.	router
External BGP is the routing protocol used between routers in different autonomous systems.	True
What is an advantage offered by GRE tunnels?	support for IP multicast tunneling
Which statement describes a characteristic of standard IPv4 ACLs?	They filter traffic based on source IP addresses only.
Which PPP option enables load balancing on PPP-enabled interfaces that connect to a single destination?	Multilink
A construction firm is building a power plant at a remote and isolated mine site and needs to connect the data network of the plant to the corporate network. Which public technology is the most suitable to meet the connection needs?	satellite Internet
Which PPP protocol allows a device to specify an IP address for routing over the PPP link?	IPCP
PPP authentication is performed at which OSI layer?	Layer 2
What is a disadvantage of leased lines?	high cost
Which public WAN technology provides security by using encrypted tunnels over Internet connections?	VPN
A construction firm is building a power plant at a remote and isolated mine site and needs to connect the data network of the plant to the corporate network. Which public technology is the most suitable to meet the connection needs?	satellite Internet
What TCP port is used by BGP to exchange messages between routers?	179
Which protocol is used by PPP to provide authentication and protection from playback attacks?	CHAP
MAC address table flooding attacks are addressed with port security.	True
What does the WFQ automated scheduling method stands for?	weighted fair queuing
It is a type of DHCP where the attacker floods the DHCP server with bogus DHCP requests and eventually leases all of the available IP addresses in the DHCP server pool.	DHCP starvation attack
Packets are forwarded in the order in which they are received.	FIFO
It is an SPAN Terminology which refers to the port that is monitored with use of the SPAN feature answer Source (SPAN) port	Source (SPAN) port (wrong)
Which model is the only QoS model with no mechanism to classify packets?	best-effort
CBWFQ extends the standard WFQ functionality to provide support for user-defined traffic classes.	True
What mitigation plan is best for thwarting a DoS attack that is creating a switch buffer overflow?	Enable port security
The show monitor command is used to verify the SPAN session.	True
Delay-sensitive data such as voice is added to a priority queue so that it can be sent first (before packets in other queues).	LLQ
What is an SNMP management agent?	software that is installed on devices managed by SNMP
It is a queuing algorithm which is an automated scheduling method that provides fair bandwidth allocation to all network traffic	w eighted fair queuing
It is a type of DHCP attack where the attacker configures a fake DHCP server on the network to issue IP addresses to clients.	DHCP spoofing attack
allows source and destination ports to be in different switches.	rspan
How can SNMP access be restricted to a specific SNMP manager?	Define an ACL and reference it by using the snmp-server community command.
It is a queuing algorithm which extends the standard WFQ functionality to provide support for user-defined traffic classes.	cbwfq
It is a queuing algorithm also known as first-come, first-served (FCFS) queuing, involves buffering and forwarding of packets in the order of arrival.	FIFO
Network traffic can be marked at both Layer 2 and Layer 3 for QoS..	True
In the 802.1X standard, the client attempting to access the network is referred to as the supplicant.	True
It is a type of telnet attack where the attacker continuously requests Telnet connections in an attempt to render the Telnet service unavailable and preventing an administrator from remotely accessing a switch.	telnet dos attack
What is the default queuing method used on the LAN interfaces of Cisco devices?	FIFO
Under which condition does congestion occur on a converged network with voice, video, and data traffic?	if the request for bandwidth exceeds the amount of bandwidth available
Which service is enabled on a Cisco router by default that can reveal significant information about the router and potentially make it more vulnerable to attack?	CDP
VLAN attacks are controlled by disabling DTP and following basic guidelines for configuring trunk ports.	True
Simple Network Management Protocol (SNMP) was developed to allow administrators to manage nodes such as servers, workstations, routers, switches, and security appliances, on an IP network.	True
What happens when an edge router using IntServ QoS determines that the data pathway cannot support the level of QoS requested?	Data is not forwarded along the pathway.
It is a SPAN Terminology which refers to the traffic that leaves the switch.	egress traffic
It SPAN Terminology which refers to the traffic that enters the switch.	ingress traffic
How many levels of priority are possible when using class of service (CoS) marking on frames?	8
SNMP is an application layer protocol that provides a message format for communication between managers and agents	True
The _______feature on Cisco switches is a type of port mirroring that sends copies of the frame entering a port, out another port on the same switch.	switched port analyzer
Simple Network Management Protocol (SNMP) was developed to allow administrators to manage nodes such as servers, workstations, routers, switches, and security appliances, on an IP network	True
It is a queuing algorithm which feature brings strict priority queuing (PQ) to CBWFQ.	LLQ
Packets are assigned to user-defined classes based on matches to criteria such as protocols, ACLs, and input interfaces.	CBWFQ
Which queuing method provides user-defined traffic classes where each traffic class has a FIFO queue?	CBWFQ
What happens when the memory queue of a device fills up and new network traffic is received?	he network device will drop the arriving packets.
Which statement describes the QoS classification and marking tools?	Marking is the adding of a value to a packet header.
DHCP is the protocol that automatically assigns a host a valid IP address out of a DHCP pool.	True
Packets are classified into different flows based on header information including the ToS value.	WFQ
The LLQ feature brings strict priority queuing (PQ) to CBWFQ.	True
What does the FIFO queuing stands for?	first-in first-out
DHCP _______ is a mitigation technique to prevent rogue DHCP servers from providing false IP configuration parameters.	snooping
It is an ever increasing requirement of networks today	Quality of Service
QoS model specifies a simple and scalable mechanism for classifying and managing network traffic and providing QoS guarantees on modern IP networks.	differentiated services
IntServ provides a way to deliver the end-to-end QoS that real-time applications require by explicitly managing network resources to provide QoS to specific user packet streams, sometimes called microflows.	True
Which type of traffic does Cisco recommend be placed in the strict priority queue (PQ) when low latency queuing (LLQ) is being used?	voice
It is a type of telnet attack where the attacker may use a list of common passwords, dictionary words, and variations of words to discover the administrative password	telnet dos attack
The Cisco Discovery Protocol (CDP) is a proprietary Layer 2 link discovery protocol.	True
Which mode is used to configure SNMP?	global configuration mode
allows source and destination ports to be in different switches.	rspan
SDN is a network architecture that has been developed to virtualize the network.	True
What is a characteristic of data flow processing in SDN?	Each data flow through the network must be approved by the SDN controller first.
The show ip interface brief and show ipv6 interface brief commands are used to display the up or down status and IP address of all interfaces on a device.	True
This type of SDN uses a centralized controller that has knowledge of all devices in the network.	Controller-based SDN
A network engineer is investigating an access issue to a web server. The web server can access the Internet and the local clients can open the web pages. However, outside clients cannot access the web pages. What is the most likely cause of the problem?	An ACL is blocking incoming connections.
One of the new challenges associated with the rapid growth of the IoT is integrating many devices from different vendors with custom applications.	True
Cloud computing and virtualization are different terms that refer to the same thing.	False
This is typically regarded as the brains of a device.	control plane
A purpose-built hardware solution for integrating cloud computing and data center management.	Cisco Application Centric Infrastructure
Which Cloud computing service would be best for an organization that needs to collaboratively create applications and deliver them over the web?	PaaS
Which statement describes the physical topology for a LAN?	It defines how hosts and network devices connect to the LAN.
The OSI reference model describes how information from a software application in one computer moves through a network medium to a software application in another computer	True
One of the new challenges associated with the rapid growth of the IoT is integrating new things into existing networks.	True
Today, over __% of things in the physical world are still not connected to the Internet. Select the answer that will complete the statement.	99
A client calls the support desk and says this to a technician: "I have just started my computer and attempted to check e-mail. The error 0x800ccc0d was displayed. However, I was able to connect to network drives and access the Internet." Which statement would describe the status of this issue?	The helpdesk has enough information to begin finding a resolution.
One of the new challenges associated with the rapid growth of the IoT is developing better routing protocols for new devices	False
A network architecture that virtualizes the network	Software Defined Networking
Use the show ip sla configuration operation-number command to display configuration values including all defaults for IP SLA operations or for a specific operation.	True
When is the most appropriate time to measure network operations to establish a network performance baseline?	at the same time each day across a set period of average working days, so that typical traffic patterns can be established
An _______ is a collection of end-point groups (EPG), their connections, and the policies that define those connections	Application Network Profile
Which command runs several other show commands in order to generate many pages of detailed troubleshooting information?	show tech-support
What is an example of an M2M connection?	a sensor in a garbage can signaling that it is full and delivering the data to a GPS mapping system for the sanitation truck to adjust its route for pickups
topology shows the physical layout of the devices connected to the network.	Physical network
These switches provide an application-aware switching fabric and work with an APIC to manage the virtual and physical network infrastructure.	Cisco Nexus 9000 series switch
A network engineer is troubleshooting a network that has recently been updated with a new routing protocol, but the network is not working as expected. The engineer is comparing the running configuration from before and after the change was made. Which approach to troubleshooting the problem is the engineer using?	divide-and-conquer
Which troubleshooting tool can be used to pinpoint the distance to a break in a network cable?	cable tester
For a data center, what is the difference in the server virtualization data traffic compared with the traditional client-server model?	There are significant data exchanges between virtual servers.
Which network traffic management technology is a basic element in SDN implementations?	OpenFlow
is software that creates and runs VM instances and can be installed directly on hardware or run as an application on an OS.	hypervisor
One of the new challenges associated with the rapid growth of the IoT is increasing the CPU power of computers	False
A network administrator issues the telnet www.cisco.com 25 command on the workstation. What is the purpose of this command?	to probe the server that provides the web service to determine if it is also running an email service
What is Fog computing?	It is a type of computing where services are hosted where they are used, such as at the network edge or with end devices.
One of the new challenges associated with the rapid growth of the IoT is securing new devices with varying level of security.	True
The IoT refers to the network of billons of physical objects accessible through the Internet as we continue to connect the unconnected.	True
topology illustrates how devices are logically connected to the network, meaning how devices actually transfer data across the network when communicating with other devices.	logical network
The show cdp neighbors detail command is used to obtain detailed information about directly connected Cisco neighbor devices.	True
diagrams keep track of the location, function, and status of devices on the network.	network topology
are specialized, handheld devices designed for testing the various types of data communication cabling	cable testers
Also called the forwarding plane, this plane is typically the switch fabric connecting the various network ports on a device	data plane
Which term describes the data exchanges between virtual servers in a data center?	east-west traffic
An attack has been launched within a company and a host name has been identified as the source. What command can a network technician use to determine the IP address assigned to the host name?	nslookup
What is a characteristic of the two-tier spine-leaf topology of the Cisco ACI fabric architecture?	The leaf switches always attach to the spines, but they never attach to each other.
One of the new challenges associated with the rapid growth of the IoT is improving the Internet connections from homes	False
is considered to be the brains of the ACI architecture	Application Policy Infrastructure Controller
transmits bits from one computer to another and regulates the transmission of a stream of bits over the physical medium.	physical layer
After gathering symptoms, if the troubleshooter determines that the problem is located outside the control of the organization, what is the next step?	Contact the administrator of the external system.
Which component in a traditional infrastructure device provides Layer 2 and Layer 3 functions to create data paths within a network?	control plane
How many "things" are predicted to be interconnected on the Internet by 2020?	50 billion
The show ip route and show ipv6 route commands are used to display the routing table in a router to learn the directly connected neighbors, more remote devices (through learned routes), and the routing protocols that have been configured.	True
Which feature sends simulated data across the network and measures performance between multiple network locations?	IP SLA