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What encryption is used to provide MICs and encryption in WPA? - Answer: TKIP (Temporal Key Integrity Protocol) True or False: When inputting passwords for enable mode, will the engineer use the password from enable password or enable secret? - Answer: Enable secret *Enable secret will override enable password command WLAN Components: Describe Access Point - Answer: device that provides Wi-Fi devices with a connection to a wired network WLAN Components: Describe Virtual Interface - Answer: Used to support mobility management WLAN Components: Describe Dynamic Interface - Answer: Applied to the WLAN for wireless client communication WLAN Components: Describe Service Port - Answer: Used for out of band management of WLC WLAN Components: Describe Wireless LAN Controller - Answer: Devices that manages access points Which two values or settings must be entered when configuring a new WLAN in the Cisco Wireless LAN Controller GUI? (Choose two.) - Answer: SSID Profile Name Which attribute does a router use to select the best path when two or more different routes to the same destination exist from two different routing protocols? - Answer: Administrative Distance
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Which two actions influence the EIGRP route selection process? (Choose two.) - Answer:
- The router calculates the feasible distance of all paths to the destination route.
- The router calculates the best backup path to the destination route and assigns it as the feasible successor. Which two outcomes are predictable behaviors for HSRP? (Choose two.) - Answer: - The two routers negotiate one router as the active router and the other as the standby router.
- The two routers share a virtual IP address that is used as the default gateway for devices on the LAN. How does HSRP provide first hop redundancy? - Answer: It uses a shared virtual MAC and a virtual IP address to a group of routers that serve as the default gateway for hosts on a LAN. In OSPF, what is the default OSPF type for ETHERNET interfaces? - Answer: Broadcast In OSPF, what is the default OSPF type for SERIAL interfaces? - Answer: Point-to- Point Which command enables a router to become a DHCP client? - Answer: ip address dhcp What is the primary difference between AAA authentication and authorization? - Answer: Authentication identifies and verifies a user who is attempting to access a system, and authorization controls that tasks the user can perform. Which two encoding methods are supported by REST APIs? - Answer: XML
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- Route with shortest prefix match - Answer: Route with lowest AD True or False Metrics can only be used to compare routes from the same routing protocol. Therefore, when a routing protocol contains multiple routes to the same destination network, a router prefers the route with the lowest metric. - Answer: TRUE In controller-based network, what typically contains end devices and L2 switches? - Answer: The data plane What two routing protocols support equal-cost load balancing? - Answer: RIP and OSPF What routing protocol supports unequal-cost load balancing? - Answer: EIGRP When configuring WLAN by using WLC GUI, what setting are you most likely using the Layer 3 Security drop-down list on the Layer 3 tab? - Answer: VPN Pass-Through There are two types of WLANs you can configure by using the WLC GUI: WLAN and Guest LAN. VPN Pass-Through is ONLY available to WLAN. When configuring GUEST LAN by using WLC GUI, what setting are you most likely using the Layer 3 Security drop-down list on the Layer 3 tab? - Answer: Web Authentication Web Passthrough What VLAN is used by DTP to negotiate a trunk link when 802.1Q encapsulation is configured on the interface? - Answer: NATIVE VLAN Virtual MAC address of HSRP version 2? - Answer: 0000.0C9F.F00A
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An API provides data to an administrator from a centralized controller. What network management technique is being used? - Answer: Network Automation What command will automatically enable SSH on a router? - Answer: crypto key generate rsa What Cisco lightweight AP modes provides BSSs? - Answer: local
- Default lightweight AP mode What encryption is used to provide MICs and encryption in WPA2? - Answer: AES CCMP AD of IS-IS? - Answer: 115 What language format is a REST API encoding format that uses HTML-like tags to define blocks of data? - Answer: XML What is a duplex? - Answer: communication system is a point-to-point system of two devices that can communicate with each other in both direction What is half-duplex? - Answer: it cannot send and receive data at the same time. Network hubs run in half-duplex mode in order to prevent collisions. Since hubs are rare in modern LANs, the half-duplex system is not widely used in Ethernet networks anymore. What is a full duplex? - Answer: all nodes can send and receive on their port at the same time. There are no collisions in full-duplex mode, but the host NIC and the switch port must support the full-duplex mode What is the IEEE of Bluetooth? - Answer: 802.15 WPAN
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Which of the wireless networks typically uses lower powered transmitters for short ranges? - Answer: WPAN In wireless, what does AP stand for? - Answer: Access Point What does SSID stand for? - Answer: shared service set identifier (SSID) The wireless router advertises its wireless services by sending ______________containing its shared service set identifier (SSID) - Answer: Beacons What does QoS stand for and what does it do? - Answer: Quality of Service is a feature of routers and switches which prioritizes traffic so that more important traffic can pass first. What does WAP stand for and what is it exactly? - Answer: Wireless Access Point more generally just an access point, is a networking hardware devices that allows other Wi-Fi devices to connect to a wired network. What does Wi-Fi stand for? - Answer: Wireless Fidelity technically, this is not the case. Wi-Fi is simply a trademarked term meaning IEEE 802.11x. What is an Autonomous AP? - Answer: - Standalone devices like a home router. Where the entire WLAN configuration resides on the device.
- Sometimes called thick APs
- do not require a controller to control the AP and it use WLSE for management software
- use for a network that requires only a couple of access points. What does WLC stand for? - Answer: Wireless LAN Controller
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What does AS stand for? - Answer: Autonomous System What are Controller-based APs? - Answer: - These devices require no initial configuration and are often called lightweight APs (LAPs).
- Also called thin APs
- Centralized management, configuration, encryption, updates and policy settings through a centralized controller LAPs - Answer: Lightweight Access Points LWAPP - Answer: Light Weight Access Point Protocol What is another name for LAPs? - Answer: Controller-based APs LAG - Answer: Link Aggregation Group What is MIMO? - Answer: Multiple Input Multiple Output. Uses multiple antennas to increase available bandwidth for IEEE 802.11n/ac/ax wireless networks. Up to eight transmit and receive antennas can be used to increase throughput. Which of the following components are integrated in a wireless home router?
- Access Point
- Switch
- Router
- Range Extender - Answer: Access Point, Switch, Router
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What is telnet port number? - Answer: 23 SMTP (Simple Mail Transfer Protocol) and port number - Answer: port 25 DNS (Domain Name System) port number - Answer: 53 HTTP (Hypertext Transfer Protocol) port number - Answer: 80 SNMP (Simple Network Management Protocol) port number - Answer: 161 What portocols are reliable, connection oriented and use TCP? - Answer: FTP, SSH, Telnet, SMTP, DNS, HTTP, POP3, NTP, IMAP4, HTTPS What protocols are unreliable, connectionless and use UDP? - Answer: DNS, DHCP, TFTP, SNMP What is DHCP? - Answer: A protocol used to automate the assignment of IP Address. It stands for Dynamic Host Control Protocol and is the successor to BOOTP. DHCP port number - Answer: 67 What is HSRP? - Answer: HSRP stands for Hot Standby Router Protocol, it was designed for gateway redundancy without addition config on end devices. Routers configured with HSRP present themselves as a single virtual default gateway.
- It is Cisco Proprietary
- has one active router and one standby router What does VRRP stand for? - Answer: Virtual Router Redundancy Protocol
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Has one master router and multiple backup routers What is VRRP virtual MAC address? - Answer: 0000.5E00.01xx 0000.5E00.01xx, where xx is the value ID for the VRRP group number What is FHRP? - Answer: First-Hop Redundancy Protocol In show ip route command, what letter represents EIGRP? - Answer: D In show ip route command, what letter represents OSPF? - Answer: O In show ip route command, what letter represents directly connected routes? - Answer: C In show ip route command, what letter represents static route? - Answer: S In show ip route command, what letter/symbol represents default routes? - Answer:
on a route such as S * 0.0.0.0/0 [1/0] via Fastethernet 0/ In show ip route command, what letter represents local/host connected directly connected? - Answer: L What is PAgP? - Answer: Port Aggregation Protocol is a Cisco proprietary link aggregator protocol that can bundle up to 8 active ports.
- Only uses DESIRABLE and AUTO modes
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- Number of host on a /24 and it subnet mask - Answer: 256; 255.255.255.
- Number of host on a /23 and it subnet mask - Answer: 512; 255.255.254.
- Host on a /22 and it subnet mask - Answer: 1024; 255.255.252.
- Host on a /21 and it subnet mask - Answer: 2048; 255.255.248.
- Host on a /19 and it subnet mask - Answer: 8192; 255.255.224.
- Host on a /18 and it subnet mask - Answer: 16384; 255.255.192.
- Host on a /25 and it subnet mask - Answer: 128; 255.255.255.
- Host on a /26 and it subnet mask - Answer: 64; 255.255.255.
- Host on a /27 and it subnet mask - Answer: 32; 255.255.255.
- Host on a /28 and it subnet mask - Answer: 16; 255.255.255.
- Host on a /29 and it subnet mask - Answer: 8; 255.255.255.
- Host on a /30 and it subnet mask - Answer: 4; 255.255.255.
- Host on a /31 and it subnet mask - Answer: 2; 255.255.255.
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Host on a /32 and it subnet mask - Answer: 1; 255.255.255. Host on a /17 and it subnet mask - Answer: 32768; 255.255.128. Host on a /16 and it subnet mask - Answer: 65536; 255.255.0. What is the reserved ranges on RFC 1918? - Answer: 10.0.0.0-10.255.255. 172.16.0.0-172.31.255. 192.168.0.0-192.168.255. What is the reserved range for loopback addresses? - Answer: 127.0.0.0- 127.255.255. What is the Class A range of addresses? - Answer: 10.0.0.0 - 10.255.255. What is the Class B range of addresses? - Answer: 172.16.0.0 - 172.31.255. What is the Class C range of addresses? - Answer: 192.168.0.0 - 192.168.255. What do unique local IPv6 unicast prefix always begin with? - Answer: FD or FC Because the first 7 bits of a unique local unicast address are always 1111110 They can not be aggregatable nor summarized. What is the address range if a host IP can not obtain a network address via DHCP? - Answer: 169.254.1.0 to 169.254.254. What protocol uses UDP and TCP? - Answer: DNS (Domain Name System)
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HDLC is a point-to-point protocol used on leased lines. No authentication can be used with HDLC. What is the difference between HDLC and PPP? - Answer: The major difference between HDLC and PPP , the PPP protocol performs better than HDLC because there is no compulsion of using the Cisco devices in both the ends, which means these are interoperable. PPP also supports multiple protocols and support authentication. What is PPP? - Answer: Point-to-Point Protocol (PPP) is a Data Link layer protocol that can be used over either asynchronous serial (dial-up) or synchronous serial (ISDN) media. It uses Link Control Protocol (LCP) to build and maintain data-link connections. Network Control Protocol (NCP) is used to allow multiple Network layer protocols (routed protocols) to be used on a point-to-point connection. The basic purpose of PPP is to transport layer 3 packets across a Data Link layer point-to-point link, and it's nonproprietary. The PPP protocol stack is specified at the Physical and Data Link layers only. In 802.11 wireless topology, what is BSS in Infrastructure? - Answer: Basic Service Set; Consist of a single AP interconnecting all associated wireless clients. The radius of which it covers in it wireless range is called a Basic Service Area (BSA). Layer 2 MAC address of the AP is used to uniquely ID each BSS which is called a Basic Service Set Identifier (BSSID). In 802.11 wireless topology, what is ESS in infrastructure? - Answer: Extended Service Set ESS is ID by a SSID and each BSS is ID by its BSSID. When you need more coverage, two or more BSS can join through a common distribution system (DS) into an ESS. The whole covered area is called an Extended Service Area (ESA). A client in one BSA can now communicate with other clients in another BSA within the same ESS. Like a roaming cell phone user may move from one BSA to another and it would be seamless
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Since WLAN are half-duplex, what do we use to avoid collision? - Answer: (CSMA/CA) carrier sense multiple access with collision avoidance. What is the port number of RADIUS? - Answer: 1812 for authentication 1813 for accouting 1645/1646 for UDP ports AD of directly connected routing - Answer: 0 AD of static route - Answer: 1 AD of internal EIGRP - Answer: 90 AD of OSPF - Answer: 110 AD of RIP - Answer: 120 AD of External EIGRP - Answer: 170 What parameter does RIP use to calculate metric? - Answer: Hop count What parameter does EGIRP use to calculate metric? - Answer: bandwidth, delay What parameter does OSPF use to calculate metric? - Answer: cost Characteristic of distance vector? - Answer: - sends entire routing table
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What is EIGRP? - Answer: Enhanced Interior Gateway Routing Protocol. Is an advanced distance vector routing protocol. EIGRP supports classless routing and VLSM, route summarization, incremental updates, load balancing and many other useful features. It is a Cisco proprietary protocol, so all routers in a network that is running EIGRP must be Cisco routers. What metric does EIGRP use? - Answer: bandwidth and delay What metric does OSPF use to calculate the best path? - Answer: Cost What metric does RIP use to calculate best path? - Answer: Hop count How do you untag a VLAN? - Answer: You set it as a native VLAN What is RFC 1918? - Answer: RFC 1918 is Address Allocation for Private Internets The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private Internets: 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/ What is Cisco ACI? - Answer: Application Centric Infrastructure What layer is MPLS considered and what does it stand for? - Answer: Layer 2.5; Multiprotocol Label Switching What is another name for a Hypervisor? - Answer: VMM (Virtual Machine Monitor) What is CRC stand for? - Answer: Cyclic Redundancy Check What is another name/nickname for a dashboard? - Answer: A single pane of glass
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What are the Northbound APIs? - Answer: OSGi REST What are the Southbound APIs? - Answer: NETCONF OnePK OpenFlow OpFlex What does the CAM table use to populate it? - Answer: The source MAC address Switches make forwarding decisions based on the_______ contained in a frame's header. - Answer: Destination MAC Address What is SaaS? - Answer: Software as services enables it consumer to access applications running in the cloud infrastructure but does not enable the consumer to manage the cloud infrastructure or the configs of the provided applications. A good example is a company license an office suite, including email service, that is delivered to the end user through a web browser. What is IaaS? - Answer: Infrastructure as a Service the greatest degree of freedom by enabling its consumer to provision processing, memory, storage and network resources within the cloud infrastructure. Customer does NOT have control over the physical infrastructure in the cloud. What is PaaS? - Answer: Platform as a Service provides it consumer with slightly more freedom than the SaaS model by enabling the consumer to install and possibly config provider supported applications in the cloud infrastructure. An example would be a company obtains a subscription to use a service provider's infrastructure, programming tools, and programming languages to develop and serve cloud based applications.
