**Customer Service/Support****Location**- Pavas, Costa Rica***Job Title:Networking Support Engineer (Switching, Routing, Security)**Job Description**:The Technical Support Associate provides advanced technical support for designated client products. You will handle escalated or complex customer cases for external/internal users of a client's products or services.** Essential Functions/Core Responsibilities**:- Provide advanced technical support by handling escalated or complex customer cases, while under mínimal supervision- Identify, investigate, research and provide resolution on user questions and problems, including hardware, software, networking, or other designated client products- Follow appropriate escalation path to resolve technical issues; including making follow up outbound calls to customers or other parties as needed- Solve problems that are generally unstructured and require extensive use of conceptual thinking skills- Ensure service delivered to our customers meets contractual Key Performance Indicator ('KPIs')- Log all incoming calls and accurately complete case notes in the call tracking database- Associate's Degree in related technical discipline with one to three years of related technical experience preferred- In-depth knowledge of**: Network Fundamentals,**:- OSI Model (concept, layers' functionality, PDUs, encapsulation/decapsulation).- IP, Ethernet, TCP, UDP headers and fields' functionality.- Networking devices' functionality and operation (Router/Switch/Proxy server)- Unicast, multicast and broadcast at Layer 2 and 3.- Switching: MAC learning, forwarding, filtering, flooding, blocking.- Broadcast domains, vlans, intervlan routing, tagged/untagged ports, routing-on-a -stick.- ARP, GARP, Reverse ARP.- MAC Table vs Routing table vs ARP Table.- STP (concept, loop avoidance mechanism, port roles and states).- Subnetting, Subnet Mask, Default Gateway, valid host addresses, broadcast.- Static routing vs dynamic routing- Asymmetric routing, routing-instances, policy-based routing, PPP/PPPoe.- IP concepts: TTL, QoS, MTU, PMTUD, IP fragmentation and reassembly.- TCP (fundamentals, MSS, flags' functionality, 3-way-handshake, 4-way-close, sequencing and acknowledging, windowing).- Troubleshooting tools: ICMP tools, sniffing tools (tcpdump, wireshark, port-mirror), windows/linux network related commands, PMTUD, verifying TCP open ports with telnet, DNS resolution checks, external monitoring tools, techniques for isolating the issue, use of OSI for troubleshooting.Telnet vs SSH (functionality, use cases, L4 ports and protocols).NTP (functionality, use cases, L4 ports and protocols).FTP (functionality, active vs passive, use cases, L4 ports and protocols).SNMP, SYSLOG, HTTP(S), SMTP (functionality, use cases, L4 ports and protocols).DHCP (functionality, DORA, Relay, options, use cases, L4 ports and protocols).DNS (functionality, use cases, L4 ports and protocols, DNS doctoring).Radius, TACACS, LDAP (functionality, use cases, L4 ports and protocols).- Basic Networking Attacks (IP sweep, port-scanning, MITM, Dos/DDoS, DNS poisoning, etc).- Firewall handling of sessions/flows.- NAT (concept, source/destination/static/PAT, Port-forwarding, Proxy-ARP, use cases)- Security concepts (confidentiality, integrity, authentication).- Encryption, hashing and authentication, types and algorithms examples.- Key exchange mechanisms like Diffie-Hellman, PKI.- IPsec principles and benefitsNegotiation (IKE messages exchange, Maim mode vs Aggressive mode, traffic-selectors)NAT-T- IPS/IDS.- ALGs (concept and use cases, like FTP).- UTM.- SSL Proxy**Location**:CRI Work-at-HomeLanguage Requirements:Time Type:**If you are a California resident, by submitting your information, you acknowledge that you have read and have access to the **Job Applicant Privacy Notice for California Residents*******Similar jobs**:**Customer Service/Support****Customer Service Representative (Swedish-speaking) - On-site**:In this dynamic role, you'll interface with customers via inbound/outbound calls and/or via the Internet. This position is onsite in**Barcelona, Spain*******Swedish****Customer Service/Support****Commerciaux en BtoB Fès Mai 2024**:Mission :Nous cherchons des Commerciaux BtoB à Fès, alors pourquoi pas vous ?Vous souhaitez travailler dans un environnement agréable avec de**Fes, Morocco*******French****Customer Service/Support****Kundenberater (m/w/d) für Banken und Finanzen - 100% Homeoffice**:Du suchst einen Job, der zu dir und deinem Leben passt? Dann ist diese Stelle genau das Richtige für dich.In**Remote, Germany*******German****Customer Service/Support****Customer Service Representative - Non-Voice**:Are you looking for a career change with a forward-thinking global organization? We're on the lookout for Customer Representatives- **Gurugram, India*******English****More jobs
