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What is the IEEE of Bluetooth? - correct answer ✅802.15 WPAN.
What is WiMAX and it IEEE? - correct answer ✅-Worldwide Interoperability for Microwave Access
-IEEE 802.16 WWAN.
In cellular broadband there are two types of cellular networks, what are
they? - correct answer ✅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. - correct answer ✅Satellite Broadband
What is the 802.11 WLAN? - correct answer ✅WiFi/wireless devices are based on IEEE 802.11.
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? - correct answer ✅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? -
correct answer ✅2.4GHz and 5GHz.
Which 802.11 standards exclusively use the 5 GHz radio frequency? - correct
answer ✅802.11a
802.11ac
Which of the wireless networks typically uses lower powered transmitters
for short ranges? - correct answer ✅WPAN.
In wireless, what does AP stand for? - correct answer ✅Access Point
What is an Autonomous AP? - correct 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? - correct answer ✅Wireless LAN Controller
What does AS stand for? - correct answer ✅Autonomous System
What are Controller-based APs? - correct 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 - correct answer ✅Lightweight Access Points
LWAPP - correct answer ✅Light Weight Access Point Protocol
What is another name for LAPs? - correct answer ✅Controller-based APs
LAG - correct answer ✅Link Aggregation Group
What is MIMO? - correct 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
Software-Defined Networking (SDN) is what? - correct answer ✅The physical separation of the network control plane from the forwarding plane, and where a control plane controls several devices.
dynamic, manageable, cost-effective, and adaptable
What is FTP and it port number? - correct answer ✅File Transfer Protocol
Port 20, 21
Provides reliability when loading an IOS image upon boot up
What is SSH and it port number? - correct answer ✅Secure Shell Protocol
port 22
What is telnet port number? - correct answer ✅ 23
SMTP (Simple Mail Transfer Protocol) and port number - correct answer
✅port 25
DNS (Domain Name System) port number - correct answer ✅ 53
HTTP (Hypertext Transfer Protocol) port number - correct answer ✅ 80
SNMP (Simple Network Management Protocol) port number - correct
answer ✅ 161
What portocols are reliable, connection oriented and use TCP? - correct
answer ✅FTP, SSH, Telnet, SMTP, DNS, HTTP, POP3, NTP, IMAP4, HTTPS
What protocols are unreliable, connectionless and use UDP? - correct
answer ✅DNS, DHCP, TFTP, SNMP
What is DHCP? - correct 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 - correct answer ✅ 67
In show ip route command, what letter represents OSPF? - correct answer
✅O
In show ip route command, what letter represents directly connected
routes? - correct answer ✅C
In show ip route command, what letter represents static route? - correct
answer ✅S
In show ip route command, what letter/symbol represents default routes? -
correct 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? - correct answer ✅L
What is PAgP? - correct 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
By default the maximum time that a Cisco switch will retain LLDP info before discarding it when it is enabled on an interface is - correct answer
✅120 seconds
By default, a cisco switch will send LLDP advertisements every seconds
when LLDP is enabled on an interface - correct answer ✅ 30
What is LLDP on a Cisco switch? - correct answer ✅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? - correct answer ✅VLAN Trunking Protocol (VTP)
is a Layer 2 messaging protocol that maintains VLAN configuration consistency throughout a common administrative domain by managing
Number of host on a /24 and it subnet mask - correct answer ✅256;
- 255.255.255.
- 255.255.254. Number of host on a /23 and it subnet mask - correct answer ✅512;
- Host on a /22 and it subnet mask - correct answer ✅1024; 255.255.252.
- Host on a /21 and it subnet mask - correct answer ✅2048; 255.255.248.
- Host on a /19 and it subnet mask - correct answer ✅8192; 255.255.224.
- Host on a /18 and it subnet mask - correct answer ✅16384; 255.255.192.
- Host on a /25 and it subnet mask - correct answer ✅128; 255.255.255.
- Host on a /26 and it subnet mask - correct answer ✅64; 255.255.255.
- Host on a /27 and it subnet mask - correct answer ✅32; 255.255.255.
- Host on a /28 and it subnet mask - correct answer ✅16; 255.255.255.
- Host on a /29 and it subnet mask - correct answer ✅8; 255.255.255.
- Host on a /30 and it subnet mask - correct answer ✅4; 255.255.255.
- Host on a /31 and it subnet mask - correct answer ✅2; 255.255.255.
- Host on a /32 and it subnet mask - correct answer ✅1; 255.255.255.
- Host on a /17 and it subnet mask - correct answer ✅32768; 255.255.128.
- Host on a /16 and it subnet mask - correct answer ✅65536; 255.255.0.
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? - correct answer ✅169.254.1.0 to 169.254.254.
What protocol uses UDP and TCP? - correct answer ✅DNS (Domain Name System)
IPv6 multicast address? - correct answer ✅FF00::/
IPv6 Unicast Link-Local address - correct answer ✅FF80::/
Link local addresses are unicast addresses used for communication over a
link - correct answer ✅single
Link local addresses in IPv6 are used to form what? - correct answer
✅Neighbor adjacencies
Global IPv6 unicast addresses, also known as aggregable global address, do they form neighbor adjacency? - correct answer ✅NO. They do NOT form neighbor adjacency.
IPv6 multicast address for Link-local - correct answer ✅FF02::/
IPv6 multicast address for Site-local - correct answer ✅FF05::/
IPv6 multicast address for unicast site-local - correct answer ✅FC00::/
IPv6 multicast address for global address - correct answer ✅FF0E::/
Are unicast link local IPv6 addreses routable? - correct answer ✅NO.
Used for neighbor discovery
What is HDLC? - correct answer ✅The High-Level Data-Link Control (HDLC) protocol is a populare ISO-standard, bit-oriented, Data Link layer protocol. It
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? - correct 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
Since WLAN are half-duplex, what do we use to avoid collision? - correct
answer ✅(CSMA/CA) carrier sense multiple access with collision avoidance.
What is the port number of RADIUS? - correct answer ✅1812 for authentication
1813 for accouting
1645/1646 for UDP ports
AD of directly connected routing - correct answer ✅ 0
AD of static route - correct answer ✅ 1
AD of internal EIGRP - correct answer ✅ 90
AD of OSPF - correct answer ✅ 110
AD of RIP - correct answer ✅ 120
AD of External EIGRP - correct answer ✅ 170
