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What is the IEEE of Bluetooth? ✔✔802.15 WPAN
What is WiMAX and it IEEE? ✔✔-Worldwide Interoperability for Microwave Access
In cellular broadband there are two types of cellular networks, what are they? ✔✔Global System
for Mobile (GSM) and Code Division Multiple Access (CDMA).
GSM is internationally recognized, while CDMA is primarily used in the US.
Typically, it is used by rural homeowners and businesses where cable and DSL are not available.
It is usually more expensive and requires a clear line of sight. ✔✔Satellite Broadband
What is the 802.11 WLAN? ✔✔WiFi/wireless devices are based on IEEE 802.
set of protocols and wireless local area network (WLAN) Wi-Fi computer communication in various frequencies
- Radio frequency is 2.4 GHz
What is the 802.11a? ✔✔5 Ghz frequency band
IEEE standard for transmitting data over a wireless network.
What are the two allocated radio frequency in 802.11 wireless LANs? ✔✔2.4GHz and 5GHz
Which 802.11 standards exclusively use the 5 GHz radio frequency? ✔✔802.11a
802.11ac
Which of the wireless networks typically uses lower powered transmitters for short ranges?
✔✔WPAN
In wireless, what does AP stand for? ✔✔Access Point
What does SSID stand for? ✔✔shared service set identifier (SSID)
The wireless router advertises its wireless services by sending ______________containing its
shared service set identifier (SSID) ✔✔Beacons
What does WLC stand for? ✔✔Wireless LAN Controller
What does AS stand for? ✔✔Autonomous System
What are Controller-based APs? ✔✔-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 ✔✔Lightweight Access Points
LWAPP ✔✔Light Weight Access Point Protocol
What is another name for LAPs? ✔✔Controller-based APs
LAG ✔✔Link Aggregation Group
What is MIMO? ✔✔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 ✔✔Access Point, Switch, Router
What is infrastructure mode in WLAN? ✔✔A wireless router or AP connects wireless clients to a wired distribution system.
What is API and what does the acronym stand for as well? ✔✔Application Programming
Interface (API)
An API is software that allows other applications to access its data or services. It is a set of rules describing how one application can interact with another, and the instructions to allow the interaction to occur.
What is telnet port number? ✔✔ 23
SMTP (Simple Mail Transfer Protocol) and port number ✔✔port 25
DNS (Domain Name System) port number ✔✔ 53
HTTP (Hypertext Transfer Protocol) port number ✔✔ 80
SNMP (Simple Network Management Protocol) port number ✔✔ 161
What portocols are reliable, connection oriented and use TCP? ✔✔FTP, SSH, Telnet, SMTP,
DNS, HTTP, POP3, NTP, IMAP4, HTTPS
What protocols are unreliable, connectionless and use UDP? ✔✔DNS, DHCP, TFTP, SNMP
What is DHCP? ✔✔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 ✔✔ 67
What is HSRP? ✔✔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? ✔✔Virtual Router Redundancy Protocol
Has one master router and multiple backup routers
What is VRRP virtual MAC address? ✔✔0000.5E00.01xx
0000.5E00.01xx, where xx is the value ID for the VRRP group number
What is FHRP? ✔✔First-Hop Redundancy Protocol
In show ip route command, what letter represents EIGRP? ✔✔D
By default, a cisco switch will send LLDP advertisements every ____ seconds when LLDP is
enabled on an interface ✔✔ 30
What is LLDP on a Cisco switch? ✔✔Link Layer Discovery Protocol.
OSI layer 2 open standard discovery protocol that is used to facilitate interoperability between Cisco devices and non-Cisco devices. Attributes that can be learned from neighboring devices contain Type, Length, Value (TLV) info including port description, system description and management address.
What is VTP? ✔✔VLAN Trunking Protocol (VTP)
is a Layer 2 messaging protocol that maintains VLAN configuration consistency throughout a common administrative domain by managing VLAN additions, deletions, and name changes across multiple switches. Without VTP, you would have to manually add VLAN information to each switch in the network.
What is CDP? ✔✔Cisco Discovery Protocol (CDP)
is a Cisco Proprietary feature that allows you to see directly connected Cisco devices. CDP can provide VLAN Trunking Protocol (VTP) information whereas LLDP does not.
What is FlexConnect? ✔✔Software basically.
(previously known as Hybrid Remote Edge Access Point or H-REAP) is a wireless solution for branch office and remote office deployments. It enables customers to configure and control access points (AP) in a branch or remote office from the corporate office through a wide area network (WAN) link without deploying a controller in each office. The FlexConnect access points can switch client data traffic locally and perform client authentication locally when their connection to the controller is lost. When they are connected to the controller, they can also send traffic back to the controller. In the connected mode, the FlexConnect access point can also perform local authentication.
Number of host on a /24 and it subnet mask ✔✔256; 255.255.255.
Number of host on a /23 and it subnet mask ✔✔512; 255.255.254.
Host on a /22 and it subnet mask ✔✔1024; 255.255.252.
Host on a /21 and it subnet mask ✔✔2048; 255.255.248.
Host on a /19 and it subnet mask ✔✔8192; 255.255.224.
- Host on a /18 and it subnet mask ✔✔16384; 255.255.192.
- Host on a /25 and it subnet mask ✔✔128; 255.255.255.
- Host on a /26 and it subnet mask ✔✔64; 255.255.255.
- Host on a /27 and it subnet mask ✔✔32; 255.255.255.
- Host on a /28 and it subnet mask ✔✔16; 255.255.255.
- Host on a /29 and it subnet mask ✔✔8; 255.255.255.
- Host on a /30 and it subnet mask ✔✔4; 255.255.255.
- Host on a /31 and it subnet mask ✔✔2; 255.255.255.
- Host on a /32 and it subnet mask ✔✔1; 255.255.255.
- Host on a /17 and it subnet mask ✔✔32768; 255.255.128.
- Host on a /16 and it subnet mask ✔✔65536; 255.255.0.
- What is the reserved ranges on RFC 1918? ✔✔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? ✔✔127.0.0.0-127.255.255.
- What is the Class A range of addresses? ✔✔10.0.0.0 - 10.255.255.
- What is the Class B range of addresses? ✔✔172.16.0.0 - 172.31.255.
- What is the Class C range of addresses? ✔✔192.168.0.0 - 192.168.255.
What do unique local IPv6 unicast prefix always begin with? ✔✔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?
✔✔169.254.1.0 to 169.254.254.
What protocol uses UDP and TCP? ✔✔DNS (Domain Name System)
IPv6 multicast address? ✔✔FF00::/
IPv6 Unicast Link-Local address ✔✔FF80::/
Link local addresses are unicast addresses used for communication over a __________ link ✔✔single
Link local addresses in IPv6 are used to form what? ✔✔Neighbor adjacencies
synchronous serial data links using frame characters and checksums. 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? ✔✔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? ✔✔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? ✔✔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? ✔✔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
Since WLAN are half-duplex, what do we use to avoid collision? ✔✔(CSMA/CA) carrier sense multiple access with collision avoidance.
What is the port number of RADIUS? ✔✔1812 for authentication
1813 for accouting
1645/1646 for UDP ports
AD of directly connected routing ✔✔ 0
AD of static route ✔✔ 1
-doesn't know network topology
-simpler to configure
-examples: RIP, IGRP
Characteristics of Link state? ✔✔-sends only link state information
-fast convergence
-less susceptible to routing loops
-always uses multicast for the routing updates
-knows the entire network topology
-can be harder to configure
-examples: OSPF, IS-IS
Characteristics of CDP? ✔✔-60 second update frequency
-180 second hold timer (the top end timer is 255)
-enabled by default
-L2 protocol
-Cisco proprietary
-Can convey VTP information
Characteristics of LLDP? ✔✔-30 second update frequency
-120 second hold timer
-disabled by default
-L2 protocol
-Open standard protocol
What is the default mode of VTP when on a new switch? ✔✔Server mode
What is EIGRP? ✔✔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? ✔✔bandwidth and delay
What metric does OSPF use to calculate the best path? ✔✔Cost
