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Networking Fundamentals (CCST IT Support) Flashcards
Cisco CCST IT Support 100-140 Flashcards
Study our Networking Fundamentals (CCST IT Support) flashcards for the Cisco CCST IT Support 100-140 exam with 53+ flashcards. View as flashcards, a searchable table, or as a fun matching game.
| Front | Back |
| 802.1Q trunking | Tags VLAN frames to carry multiple VLANs across a single link |
| ARP purpose | Maps IPv4 addresses to MAC addresses using broadcast requests and unicast replies |
| Basic troubleshooting steps | Check physical links verify IP config ping gateway traceroute check DNS and restart devices |
| Broadcast address definition | Highest address in a subnet used to reach all hosts on that subnet |
| Cat5e vs Cat6 differences | Cat6 supports higher frequencies and better crosstalk for higher speeds |
| Channel overlap concept | Adjacent channels in 2.4 GHz overlap causing interference use non overlapping channels 1 6 11 |
| CIDR /30 use case | 255.255.255.252 gives 2 usable hosts ideal for point to point links |
| CIDR /32 meaning | Single host address no hosts available beyond the one address |
| CIDR to mask trick | Block size equals 256 minus mask octet value for the relevant octet |
| Common port DNS | 53 used for DNS queries UDP and TCP |
| Common port FTP | 21 control port for file transfer protocol |
| Common port HTTP | 80 used for unencrypted web traffic |
| Common port HTTPS | 443 used for encrypted web traffic via TLS |
| Common port LDAP | 389 directory access protocol |
| Common port NTP | 123 used for network time synchronization |
| Common port RDP | 3389 used for Windows remote desktop |
| Common port SMTP | 25 used for sending email between servers |
| Common port SNMP | 161 used for network device monitoring |
| Common port SSH | 22 secure remote shell access |
| Default gateway definition | Router address used to send traffic off the local subnet |
| DHCP DORA steps | Discover Offer Request Acknowledge sequence between client and server |
| DHCP purpose | Automates IP address and network configuration assignment |
| DNS A record | Maps a hostname to an IPv4 address |
| DNS AAAA record | Maps a hostname to an IPv6 address |
| DNS CNAME record | Alias of one name to another canonical name |
| DNS MX record | Specifies mail servers for a domain |
| Fiber types singlemode vs multimode | Singlemode for long distances small core Multimode for shorter distances larger core |
| How to calculate hosts from CIDR | Hosts = 2^(32 minus prefix) minus 2 for network and broadcast |
| ICMP role | Used for network diagnostics and error messages like unreachable and time exceeded |
| IPv4 address format | Four octets 0 to 255 in dotted decimal like 192.168.1.1 |
| IPv6 address format | 128 bit address shown as eight 16 bit hex fields separated by colons |
| Loopback addresses | IPv4 127.0.0.1 IPv6 ::1 used for local host testing |
| Maximum Ethernet cable length | 100 meters maximum for Cat5e and Cat6 structured cabling |
| MTU default size on Ethernet | 1500 bytes common maximum transmission unit |
| NAT purpose | Translates private IP addresses to public IPs allowing internet access |
| Network address definition | Lowest address in a subnet identifies the subnet itself |
| Nslookup or dig purpose | Query DNS servers to resolve names and examine records |
| PAT definition | Port Address Translation maps many private addresses to one public IP using ports |
| Ping purpose | ICMP echo request used to test basic connectivity and round trip time |
| PoE meaning | Power over Ethernet supplies DC power over network cables 802.3af 802.3at standards |
| Private IPv4 ranges | 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 |
| RJ45 vs RJ11 difference | RJ45 is 8P8C for Ethernet RJ11 is smaller for telephone |
| SSID definition | Wireless network name broadcast to identify an access point |
| STP purpose | Spanning Tree Protocol prevents switching loops by blocking redundant links |
| Subnet mask for /24 | 255.255.255.0 gives 254 usable hosts |
| Switch vs Router difference | Switches operate at Layer 2 using MAC addresses Routers operate at Layer 3 using IP routes |
| TCP features | Reliability retransmission ordering flow control congestion control |
| TCP vs UDP main difference | TCP is connection oriented and reliable UDP is connectionless and best effort |
| Traceroute purpose | Maps path and latency across hops using TTL manipulation and ICMP or UDP |
| UDP typical uses | DNS streaming video VoIP and applications needing low latency |
| VLAN purpose | Separates broadcast domains at Layer 2 to isolate traffic |
| Wireless 2.4 GHz vs 5 GHz | 2.4 GHz has longer range more interference 5 GHz has more channels higher throughput |
| WPA2 vs WEP security | WPA2 uses strong encryption WEP is insecure and deprecated |
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About the Flashcards
This study set provides a focused review of fundamental networking concepts essential for success on your exam. These flashcards for the Cisco CCST IT Support exam are designed to help you master key terminology and processes, from the physical layer up through common application protocols. By breaking down complex topics into digestible questions and answers, you can efficiently reinforce your knowledge and prepare for the types of questions you will encounter.
The deck covers critical areas such as IP addressing schemes for both IPv4 and IPv6, subnetting, and the roles of core services like DNS and DHCP. You will also review the differences between TCP and UDP, common port numbers, and essential wireless networking principles.
Topics covered in this flashcard deck:
- IP Addressing and Subnetting
- Core Network Protocols (DNS, DHCP, ARP)
- TCP, UDP, and Common Port Numbers
- Wireless Networking Concepts
- Network Troubleshooting and Utilities
- Cabling, VLANs, and Layer 2 Operations